Scientific Tools and measurement

In science, a tool is something you use to collect data, or information. Scientists use tools to help them observe, describe, compare, measure, and communicate. Balance scale, beaker, data, equal, hand lens, mass, measurement, microscope, record, ruler, senses, telescope, temperature, thermometer, tool, volume.

What kind of tools do scientist use?

Scientific Tools | Definition, List & Uses – Lesson | Study.com

There are so many tools a scientist might use. In a lab, three common tools you might find are a microscope, a bunsen burner, and a flask. Depending on the type of lab and the field of scientific study, there will be many more science tools used.

Why are tools important in science?

As already discussed, scientific instruments are the tools which make the scientific experiments easier. And this is the reason why scientists use these structured tools. It helps them to speed up their lab process and makes them safe from harsh chemicals.

What is the scientific measuring tool?

Some tools used to measure in science include a micrometer screw gauge, an equal arm beam balance, a pendulum, vernier calipers, a stopwatch and a graduated cylinder. A micrometer screw gauge and vernier calipers are used to find length. An equal arm beam balance finds mass. A pendulum and a stopwatch keep time.

What are the scientific measurements?

Units of Measurement – Physical Science

The SI system, also called the metric system, is used around the world. There are seven basic units in the SI system: the meter (m), the kilogram (kg), the second (s), the kelvin (K), the ampere (A), the mole (mol), and the candela (cd).

Science Tools List

Each field of science will have its own unique set of devices and measurement tools. The following is a list of some common scientific tools found in most science labs:

Beaker, flask ,graduated cylinder ,gram scale ,thermometer ,microscope ,petri dish ,Bunsen burner

 

What is data collection and analysis in science?
Data collection is the process of gathering and measuring information on variables of interest, in an established systematic fashion that enables one to answer stated research questions, test hypotheses, and evaluate outcomes.
What is data analysis in a science experiment?
Data analysis is a systematic process of utilizing data to address research questions.
What is the collection of data in an experiment?
Data collection is a systematic method of obtaining, observing, measuring, and analyzing accurate information. An experimental study is a standard method of data collection that involves the manipulation of the samples by applying some form of treatment prior to data collection.
What is the importance of data analysis in an experiment?
The main purpose of data analysis is to draw conclusions on specific data. Researchers use these results to draw conclusions on their study. Data analysis is used to make purposeful discoveries, suggest conclusions, support decision-making, and support or debunk previous studies.
What is the difference between data collection and data analysis?
Data collection is the process of gathering required information by primary or secondary methods and managing them in the right format. Data analytics is the the next step of data collection and here the managed data is checked and cross-checked for quality.

Controlled Variable

A controlled variable is one which the scientist holds constant (controls) during an experiment. Thus, we also know the controlled variable as a constant variable or sometimes as a “control” only.

However, the control variable is not part of an experiment, but it is important because it can have an effect on the results. Remember that it is not the same thing as a control group.

Any given experiment will have numerous control variables. It’s important for a scientist to try to hold all the variables constant except for the independent variable.

If a control variable changes during the experiment, it may invalidate the correlation between the dependent and independent variables. Whenever it is possible, control variables should be identified, measured, and recorded.

Examples of Controlled Variables

Temperature is a much common type of controlled variable. Because if the temperature is held constant during an experiment, it is controlled. Some other examples of controlled variables could be the amount of light or constant humidity or duration of an experiment etc.

Importance of the Control Variables

Although control variables may not be measured as they are not recorded, yet they can have a significant effect on the outcome of an experiment.

Therefore, the lack of awareness of control variables may lead to faulty results or what is called “confounding variables”. So, recording control variables makes it easier to reproduce an experiment and to establish the relationship between the independent and dependent variables.

For example, suppose we are trying to determine whether a particular fertilizer has an effect on plant growth. Here, the independent variable is the presence or absence of the fertilizer, whereas the dependent variable is the height of the plant or rate of growth.

If we don’t control the amount of light, for example, we perform some part of the experiment in the summer and some part during the winter, we may skew our results.

.

Dependent Variable

A dependent variable is the one which we can test in a scientific experiment, in order to get its values. The dependent variable is obviously ‘dependent’ on the independent variable.

Hence as the experimenter changes the independent variable, we can now observe and record the change in the dependent variable. So while taking data in an experiment, the dependent variable is the one being measured.

Dependent Variable Examples

A scientist is testing the effect of light and dark on the behavior of the moths by turning a light on and off. Here the independent variable is the amount of light and the moth’s reaction is the dependent variable.

A change in the independent variable i.e. amount of light directly causes a change in the dependent variable i.e. moth behavior.

What are the 3 variables in science?

These changing quantities are called variables. A variable is any factor, trait, or condition that can exist in differing amounts or types. An experiment usually has three kinds of variables: independent, dependent, and controlled.

Example: Topic- Plants grow faster in warmer temperatures.   Independent Variable: Temperature

Dependent Variable: Plant Growth

What is an example of a dependent variable in science?

Dependent variables depend on other variables. For example, if someone was studying the effects of pollution on asthma, the incidence of asthma would be the dependent variable. When you are searching for relationships between variables, you are trying to find what makes the dependent variable change.

Independent Variable

The variable that the scientist changes during their experiment are the independent variable. For example, take the experiment as a “cause and effect” exercise.

Here the independent variable is the “cause” factor. An independent variable is a variable that we can change or control in a scientific experiment. It will represent the cause or reason for an outcome.

Therefore, independent variables are the variables which the experimenter changes to test their dependent variable. A change in the independent variable will directly cause a change in the dependent variable. However, we can measure and record the effect of the dependent variable.

Independent Variable Examples

Suppose a scientist is conducting an experiment for the effect of light and dark on the behavior of moths. He is doing this by continuously turning a light on and off. Thus, here the independent variable is the amount of light and the moth’s reaction is the dependent variable.

This is the study to determine the effect of temperature on plant pigmentation. Here the independent variable (cause) is the temperature, while the amount of pigment or color is the dependent variable (the effect).

What is the Scientific Method?

The scientific method is a process for experimentation that is used to explore observations and answer questions.

There are seven steps to the scientific method: Question, Research, Hypothesis, Experiment, Data Analysis, Conclusion, and Communication

Scientific Method Examples

Following is an example of the scientific method:

Growing bean plants:

What is the purpose: The main purpose of this experiment is to know where the bean plant should be kept inside or outside to check the growth rate and also set the time frame as four weeks.

Construction of hypothesis: The hypothesis used is that the bean plant can grow anywhere if the scientific methods are used.

Executing the hypothesis and collecting the data: Four bean plants are planted in identical pots using the same soil. Two are placed inside, and the other two are placed outside. Parameters like the amount of exposure to sunlight, and amount of water all are the same. After the completion of four weeks, all four plant sizes are measured.

Analyze the data: While analyzing the data, the average height of plants should be taken into account from both places to determine which environment is more suitable for growing the bean plants.

Conclusion: The conclusion is drawn after analyzing the data.

Results: Results can be reported in the form of a tabular form.

1.What is scientific method?

The Scientific method is a process with the help of which scientists try to investigate, verify, or construct an accurate and reliable version of any natural phenomena. They are done by creating an objective framework for the purpose of scientific inquiry and analyzing the results scientifically to come to a conclusion that either supports or contradicts the observation made at the beginning.

2.What is hypothesis?

A hypothesis is an assumption that is made based on some evidence. This is the initial point of any investigation that translates the research questions into predictions. It includes components like variables, population and the relation between the variables. A research hypothesis is a hypothesis that is used to test the relationship between two or more variables.

3.Give an example of a simple hypothesis.

Consumption of sugary drinks daily results in obesity. This is an example of a simple hypothesis.

 

MCQ questions -X-ray -Science cycle –3

1.In radiotherapy, X-rays are used to:

  1. Detect bone fracture
  2. Treat cancer
  3. Detect skin disease
  4. Detect fault in the radio receiving circuit

Ans: D

2.X-rays will not show the phenomena of———–

  1. Diffraction
  2. Polarization
  3. Interference
  4. Deflection by an electric field

Ans: D

3.In radiotherapy, X-rays are used to:

  1. Detect bone fracture
  2. Treat cancer
  3. Detect skin disease
  4. Detect fault in the radio receiving circuit

Ans: B

4.X-rays can’t penetrate through a sheet of:

  1. Wood
  2. Paper
  3. Aluminum
  4. Lead

Ans: D

5.Penetrating power of X-ray increases through:

  1. Increase in p.d between cathode and anode
  2. Speed
  3. Distance
  4. Velocity

Ans: A

  1. X-rays diffraction was first of all observed by——
  2. Laue
  3. Bragg
  4. Zeeman
  5. Moseley

Ans: A

  1. The hydrogen atom does not emit X – rays because:
  2. It is too small in size
  3. Its energy levels are too far apart
  4. Its energy levels are too close to each other
  5. It has a single electron

Ans: C

  1. When objects placed in a room are exposed to X-rays, they appear:
  2. Invisible
  3. Yellow
  4. Blue
  5. Red

Ans: A

  1. 10 KeV electron strikes a tungsten target in a vacuum. The radiation emitted by the target is————-
  2. Visible light
  3. X-rays
  4. Infrared radiation
  5. Radio wave

Ans: B

  1. The wavelength of characteristic X-rays depends upon—–
  2. Size of target
  3. Mass of target
  4. Temperature of target
  5. Atomic no. of target

Ans: D

  1. The potential difference applied to an X-ray tube is 5 kV and the current through it is 3.2 mA. The no. of electrons striking the target per second is——–
  2. 2 × 1016
  3. 5 × 1016
  4. 1 × 1017
  5. 4 × 1015

Ans: A

  1. 12. Kα wavelength emitted by an atom λ is given by an atom of a number Z = 11 is λ. Find the atomic number for an atom that emits Kα radiation with wavelength 4λ.
  2. Z = 6
  3. Z = 4
  4. Z = 11
  5. Z = 44

Ans: A

What are medical devices?

Sonogram, x-ray, magnetic resonance imaging, ultrasound.

Sonography: The scientific process of developing medical images

Ultrasound: The technology that sonographers (people who specialize in sonography) use to generate medical images

Sonogram: The medical image that is produced after the completion of the ultrasound.

What is an x-ray?

An x-ray is a type of radiation used to create a picture of the inside of the body. As x-ray beams pass through your body they are absorbed differently by various structures in the body, such as bones and soft tissues, and this is used to create an image. X-ray imaging is also known as radiography.

What is magnetic resonance imaging in simple words?

Magnetic resonance imaging (MRI) is a medical imaging technique that uses a magnetic field and computer-generated radio waves to create detailed images of the organs and tissues in your body.

What is an ultrasound simple definition?

(UL-truh-sownd) A procedure that uses high-energy sound waves to look at tissues and organs inside the body. The sound waves make echoes that form pictures of the tissues and organs on a computer screen (sonogram).

Educational Professions Licensure-Science Study Guide-Cycle-3

The Science Test for teachers is one of the Professional teacher’s license requirements for science teachers of grades 3 through grade 8.

Test Overview

Test Name Science Test
Number of questions 100
Test Duration  2 hours
Format of questions  Multiple Choice questions
Test Delivery Computer delivered

Test Domains  by percentage

Content Domains Approximate Percentage of Test Approximate
Number of
Questions
1. Nature of Science and
Technology
10% 10
2. Earth and Space
Science
20% 20
3. Life Science 30% 30
Physical Science 40% 40

 

What is an example of Chomsky’s theory?

Here is an example of universal grammar rules which Chomsky developed in his theory of language acquisition:- all languages use nouns, verbs and adjectives to convey messages

According to Chomsky, humans acquire language by unconsciously storing information in the brain which can later be used for many types of written and oral communication. He also believes in the importance of children acquiring and developing effective language skills during early critical development stages.

What is Chomsky’s theory of universal grammar?

Chomsky’s theory of universal grammar states that all languages have formal universals and principles in common, with specific options and limits for variation in grammar and features between languages. Chomsky argued that all languages contain similar elements, such as the word classes of nouns, verbs, and adjectives.

What is Noam Chomsky most famous for?

Although Noam Chomsky is well known for many achievements, he is often considered the ”father of linguistics” and is most famous for the development of his theory of language acquisition. He is renowned for his strong understanding of language and its subconscious neural processes and systems.

What is an example of language acquisition in real life?

Process of Language Acquisition

For example, a child might ask their parents how was “raffic” rather than traffic, or a child might put together the word little as “ittle” or a similar-sounding word. Phonology is when the child is attempting to apply the rules of pronunciation.

At 12-18 months, children can probably say a few words and know what those words mean. For example, when your child says ‘dada’, they might be calling for dad. In the next few months, your child’s vocabulary will grow. Your child can understand more than they can say.

What is an example of Chomsky’s language acquisition device?

Chomsky’s Language Acquisition Device

He found that children attempt to apply grammatical rules to words for which their language makes an exception. For example, in following the English rules of grammar, a child might pluralize the word ‘fish’ as ‘fishes’ and ‘deer’ as ‘deers’, even though our language makes exceptions for those words.

What is an example of Chomsky’s theory?

Chomsky and others have also argued that we learn complex languages, with their intricate grammatical rules and limitations, without receiving explicit instruction. For example, children automatically grasp the correct way to arrange dependent sentence structures without being taught.

What are the principles of language acquisition according to Chomsky?

Chomsky’s theory of language acquisition argues that human brain structures naturally allow for the capacity to learn and use languages. Chomsky believed that rules for language acquisition are innate (inborn) and strengthen naturally as humans grow and develop.

 

What are the basics of second language acquisition?

Second-language acquisition assumes knowledge in a first language and encompasses the process an individual goes through as he or she learns the elements of a new language, such as vocabulary, phonological components, grammatical structures, and writing systems.

What are the five 5 stages of SLA?

Five stages of second language acquisition

1.Silent/receptive. This stage may last from several hours to several months, depending on the individual learner.

2.Early production.

3.Speech emergence.

4.Intermediate fluency.

5.Continued language development/advanced fluency.

What is an example of second language acquisition?

A typical example is the learning of English by a Japanese speaker in Japan. Although SLA often refers to the learning of any language other than L1, in recent decades there has emerged an area of research focusing on the learning of the third, or even the fourth, language, which is known as multilingual acquisition.

What is BICS and CALP?

There are two major aspects of language proficiency that must be acquired by second language learners. Jim Cummins has identified these as Basic Interpersonal Communicative Skills (BICS), or conversational proficiency, and Cognitive Academic Language Proficiency (CALP), or academic proficiency.

1.Direct method

  1. Communicative language teaching (CLT)
  2. Task-/project-/inquiry-based learning
  3. Total physical response (TPR)
  4. An eclectic approach

1: Direct method

For the direct method, all teaching is done in the target language. Translations are not allowed in class, and the focus lies heavily on speaking instead of grammar. As a result, the direct method is a very student-centered strategy that has gained popularity in recent years.

Students are supposed to learn the target language naturally and instinctively, which is why the direct method is also called the “natural approach.” Mistakes are corrected as they happen in class, and teachers reinforce the correct usage of the language with praise. This method is frequently used when teaching English online.

2: Communicative language teaching (CLT)

Communicative language teaching is perhaps the most popular approach among the methods of teaching ESL today. CLT emphasizes the student’s ability to communicate in real-life contexts. As a result, students learn to make requests, accept offers, explain things, and express their feelings and preferences.

3: Task-/project-/inquiry-based learning

This teaching strategy for ESL students can sometimes be considered a part of CLT, but it heavily emphasizes the students’ independence and individuality. Inquiry-based learning is a modern approach that is becoming widely popular in schools all over the world. By asking questions and solving problems, with the teacher as a mere learning facilitator, student motivation and participation in tasks and projects are thought to increase.

4: Total physical response (TPR)

Next is the Total Physical Response (TPR) method. You may have heard of this teaching strategy for ESL before, but what exactly is TPR? Total Physical Response has become a very popular approach in which students react to the teacher with movement. Some examples include miming, gesturing, or acting out the language.

For example, the teacher and students might make an exaggerated frown and pretend to cry when learning the word “sad.” TPR suggests that students learn the target language best through physical response rather than by analysis.

5: An eclectic approach

Many teachers choose from the collection of humanistic approaches (TPR, for example) and communicative approaches (the direct method and CLT). Often, they incorporate bits and pieces of many other teaching strategies for ESL learners and use what works best for their individual students. Generally speaking, there is no one-size-fits-all methodology. Each group of learners will have varying learning styles and preferences.

The principles of TPR, or Total Physical Response, are based on the way that children learn their first language.

Actions before words

When you learn your native language as a child, you don’t just listen to the words. You watch your parents for clues to find out what their words mean. When you start to understand the language, you don’t respond with your own words right away. You usually respond with actions first, until you know the correct words.

An example

An example of this is when a mother asks her young child to get her favorite toy. The child won’t respond “OK Mom, I’ll get it!” and then take off. At first, the child will respond with an action. In this case, the child will go and get the toy. This carries on for many months until the child begins to speak. During this time, the child cannot speak yet, but she is taking all the language in. Eventually, when the child has figured out the language, she can start to reproduce it. TPR aims to mimic this effect in the classroom.

Pairing movement and thought

TPR is a dynamic approach in which students are encouraged by the teacher to use physical responses, such as miming the meaning of a word, in addition to spoken responses. By acting out language, it is thought that students interpret meaning through different parts of the brain, pairing physical and intellectual analysis.

11 Strategies for Teaching English Language Learners

  1. Cultivate relationships

This one is a “no-brainer” no matter what language you speak. As a teacher, getting to know each student helps you understand who they are, where they come from and, perhaps, gain some insight into what teaching and learning styles are most effective for them.

For the students, knowing that your teacher cares enough to make the effort to get to know you as a person can have a motivating effect. It contributes to an atmosphere in which each student feels known and appreciated, and is therefore more likely to fully open themselves to the learning process rather than succumb to feelings of reticence or shyness that can often accompany a lack of language skills.

  1. Be culturally aware

Since many English language learners come from outside the U.S., part of creating the ideal learning atmosphere may include cultivating an appreciation of diversity. Developing an awareness of each student’s background, religious and cultural practices may also provide insights that affect how you interact with a particular student (for example, if they come from a cultural tradition where eye contact with adults is viewed as disrespectful).

At a very basic level, engaging in discussions about the different cultural backgrounds of students helps everyone get to know each other and reinforces the idea that different cultures include many similarities and differences — an important concept when some students are in the process of acquiring a new culture and language. Some educational advocates also suggest home visits as an effective “extracurricular” way for educators to invest in building rapport.

  1. Teach language skills across all curriculum topics

In many cases, your English language learners may also be receiving specific English as a Second Language instruction from an ESL specialist. However, it is helpful for teachers of all curriculum topics in mainstream classrooms to understand and embrace the role of language teacher as well.

  1. Speak slowly and be patient

You have a lot of material to cover, but there is no need to rush. In fact, teachers of ELLs are encouraged to consciously slow things down. This can mean:

Speaking in a slower, measured cadence

Being a bit more aware of your enunciation

Allowing extra time (an additional 3 to 5+ seconds) for students to respond

The extra seconds give all students a little extra time to think and formulate a response. “Researchers have found that typically most teachers give 1 to 2 seconds between asking a question and expecting a student response,” Larry Ferlazzo, a teacher, education blogger and co-author of “The ESL/ELL Teacher’s Survival Guide,” told Edutopia. “The same researchers have shown that if you wait 3 to 5 seconds, the quality of responses is astronomically greater.”

  1. Prioritize “productive language”

Speaking and writing are sometimes characterized as “productive language” because they both literally require students to “produce” language output, in contrast with reading and listening, which are described as “receptive” skills.

Teachers who are not language specialists may not be aware that English language learners are likely to develop those receptive skills first. It is important to emphasize the fact that evidence that students are reading, listening or understanding does not necessarily equate to progress in expressing themselves through fluency in speaking or writing.

  1. Use a variety of methods to engage learning

The idea here is to provide students with multiple options for taking in information, processing and making sense of ideas, and sharing what they are learning. This is often referred to as “differentiated instruction” — an educational practice that involves recognizing that “students each have their own unique gifts and challenges; interests, aptitudes and learning styles” and tailoring instruction to meet students’ individual needs.

“All kids learn better when they engage with material in multiple ways: Lessons that involve writing, speaking, drawing and listening, for example, give students four opportunities to deepen their understanding of the work. For ELLs, those additional engagements also provide a little breathing room so they can work through the language barrier.”

  1. Utilize visual aids

The strategy of using visual aids also connects to the idea of differentiated instruction, which is considered central to teaching English language learners. In this case, it is understood that some students are “visual learners” whose ability to digest and process new concepts and material is enhanced by the use of pictures, diagrams, charts and other visual tools.

The belief is that combining “nonlinguistic representation” along with the linguistic component of each lesson benefits all students and not just English language learners — the operative strategy here is to “show” as well as “tell.” In addition to pictures, diagrams, etc., teachers are encouraged to write everything on the board so students can see as well as hear the information.

  1. Coordinate with the ESL teacher

Since ELLs are often receiving specific English as a Second Language instruction from an ESL specialist, it can be very helpful to check in with their ESL instructors. Doing so can help the educators involved develop a fuller understanding of how regular classroom work can support ESL instruction, and vice versa.

Such discussions can yield insights into individual students and their learning styles or challenges; they can also be helpful for sharing information about curriculum topics, potentially providing ESL teachers with ideas for highly relevant vocabulary words that can reinforce academic lessons.

  1. Pre-teach new vocabulary words

When you have a challenging reading assignment coming up, some experts encourage you to preview or “pre-teach” new vocabulary words that may be unfamiliar to ELLs, or even to give them a copy of the article or link to the material ahead of time.

  1. Build in some group work

Instructor-led, whole-class activities may make up most of your class period but it can also be very helpful to build in time for group work as well. This is because it affords additional opportunities for ELLs to practice their language skills with peers in a less formal, lower-risk setting.

  1. Respect moments of silence

Many new language learners tend to be a little reticent and quiet, opting for silence over speaking up and saying something “wrong” in a language that is still unfamiliar. Therefore, teachers are encouraged to be mindful of this and not be too aggressive in forcing students to open up at the outset. Ongoing support and patience is preferable to pressure, since such initial silence is considered to be a normal stage in learning a second language.

ESL classroom is in a country where English is the dominant language. The students are immigrants or visitors. The class is usually of mixed nationalities, so students don’t share a native language or a common culture. Outside the classroom, students have a specific, practical need for English, and ample opportunity to use it. Students have extensive daily exposure to English-speaking culture, although their understanding may be limited by their language skills.

EFL classroom is in a country where English is not the dominant language. Students share the same language and culture. The teacher may be the only native English speaker they have exposure to. Outside of the classroom students have very few opportunities to use English. For some, learning English may not have any obvious practical benefit.  Students have limited exposure to English-speaking culture, most often through a distorted lens like TV or music.

Based on these definitions, we can see that there are important differences in the student population. Effective lesson planning must take them into account.

CEFR Knowledge

The Common European Framework of Reference for Languages (CEFR) is an international standard for describing language ability. It describes language ability on a six-point scale, from A1 for beginners, up to C2 for those who have mastered a language.

What is the CEFR English proficiency?

The CEFR organizes language proficiency in six levels, A1 to C2, which can be regrouped into three broad levels: Basic User, Independent User and Proficient User, and that can be further subdivided according to the needs of the local context. The levels are defined through ‘can-do’ descriptors.

What are CEFR levels A1 A2 B1 B2 C1 C2?

Common European Framework of Reference (CEFR)

A Beginners level     A1 A2

B Intermediate level    B1 B2

C Advanced level     C1 C2

A reading test has a text on the topic of memory. One of the questions from the text is shown below. What is wrong with this question?

Memorizing is easier when the material to be learned is _____.

  1.  in a foreign language
  2.  already partially known
  3.  unfamiliar
  4. of no particular interest
  1. There is obviously more than one correct answer.
  2. The question can be answered without reading the text.
  3.  The vocabulary is too complex for students to answer easily.
  4.  Not enough context is provided for the students to answer the question.

What is phonetics and phonology in English language teaching?

Phonetics is the study of speech sounds. Phonology is the study of the sound system of language. In teaching Enlish today, English is already devided into three circles, (1) Inner cirlce-mother tongue, (2) outer circle-second user, and (3) expanding circle-foreign user.

Why is the IPA important in learning English?

The IPA helps us to pronounce words accurately. Instead of relying on the written spelling of words, which does not always match the way we pronounce them, the phonetic alphabet describes the sounds of words (without reference to the letters of a language).

What is linguistic in English?

What is Linguistics?

Linguistics is the scientific study of language, and its focus is the systematic investigation of the properties of particular languages as well as the characteristics of language in general.

1.Which is the correct IPA transcription for the word Fat?

  1. A) /’fæt/
  2. B) /’fi:t/
  3. C) /’fɪt/
  4. D) /’feɪt/

Ans: A

 

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