# Quiz About Variables And Constants

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Quizzes Created: 9 | Total Attempts: 39,340
Questions: 10 | Attempts: 1,172  Settings  A constant is a value that cannot be altered by the program during normal execution, i.e., the value is constant. This is contrasted with a variable, which is an identifier with a value that can be changed during normal execution, i.e., the value is variable.

• 1.

### Anything that can change or be changed in an experiment are called ______________.

• A.

Graphs

• B.

Data

• C.

Variables

C. Variables
Explanation
Variables are anything that can change or be changed in an experiment. In scientific experiments, variables are manipulated or measured to observe their effects on the outcome. They can include factors such as time, temperature, concentration, or any other element that may have an impact on the experiment. By controlling and manipulating variables, scientists can analyze and understand the relationship between different factors and their effects.

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• 2.

### Look at the data table.  The person performing the experiment is going to change the amount of food the chickens will eat. The variable that the experimenter changes is called the ___________ variable.

• A.

Independent variable

• B.

Dependent variable

• C.

Constant

A. Independent variable
Explanation
The experimenter is changing the amount of food the chickens will eat, which means they have control over this variable. This variable is called the independent variable because it is the variable that is manipulated or changed by the experimenter.

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• 3.

### Look at the data table.  During the experiment, the experimenter is going to count how many eggs the chickens lay.  The experimenter is measuring the number of eggs laid. The variable being measured that may change when you change the independent variable is called the __________ variable.

• A.

Independent variable

• B.

Dependent variable

• C.

Constants

B. Dependent variable
Explanation
The dependent variable is the variable being measured that may change when the independent variable is changed. In this case, the number of eggs laid by the chickens is the dependent variable because it is being measured and it may change depending on the independent variable, which is not specified in the given information.

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• 4.

### ____________ must remain the SAME in order for the experiment to be valid.

• A.

Independent variable

• B.

Dependent variable

• C.

Constants

C. Constants
Explanation
In order for an experiment to be valid, the constants must remain the same. Constants are the factors or conditions in an experiment that are kept consistent throughout, so that any changes observed can be attributed to the independent variable. By keeping the constants unchanged, it ensures that any observed effects or changes in the dependent variable are solely due to the manipulation of the independent variable, making the experiment valid and reliable.

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• 5.

### The Independent variable usually goes in the first column of a data table. The dependent variable usually goes in the second column of a data table. Look at the table below.  Which variable is the independent variable?

• A.

Speed of ball

• B.

Distance ball rolls

• C.

Type of ball

• D.

Color of ball

C. Type of ball
Explanation
In the given table, the variables listed are "Speed of ball," "distance ball rolls," "type of ball," and "color of ball." The independent variable is the one that is manipulated or controlled by the experimenter. In this case, the experimenter is likely changing the type of ball to see how it affects the other variables. Therefore, the independent variable in this table is "type of ball."

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• 6.

### There are three types of investigations.  Descriptive investigations describe an object or event.  Comparative investigations compare different objects or events.  Experimental investigations test a variable and include a control. Use the information below to answer the following question. A student is designing an investigation to compare the speed of four different balls rolling down a ramp. What type of investigation should be used to see how fast the different balls roll down a ramp?

• A.

Descriptive

• B.

Comparative

• C.

Experimental

B. Comparative
Explanation
The student should use a comparative investigation to see how fast the different balls roll down a ramp. In a comparative investigation, different objects or events are compared to determine differences or similarities. In this case, the student wants to compare the speed of four different balls, so a comparative investigation is the most appropriate approach.

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• 7.

### The phrase "DRY MIX" helps you remember how to label a graph. Look at the graph below: What is the dependent variable?

• A.

Force

• B.

Time

• C.

Mass

• D.

Distance

D. Distance
Explanation
The dependent variable in this graph is distance. The graph is showing the relationship between distance and another variable, likely either force, time, or mass. The phrase "DRY MIX" is a mnemonic device that helps you remember how to label a graph, but it is not directly related to the dependent variable in this case.

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• 8.

### Students performed an experiment to record the temperatures on the inside of 3 different colored cars. The students made sure to record at the same time of the day.  They also made sure the cars they chose were the same size and had the same type of interior.  Why did the students keep some variables the same?

• A.

The students wanted to be safe

• B.

The students wanted to make sure they had enough time to perform the experiment

• C.

The students wanted to make sure the experiment was valid

• D.

The students wanted to use the correct thermometer.

C. The students wanted to make sure the experiment was valid
Explanation
The students kept some variables the same in order to ensure that the experiment was valid. By controlling variables such as the time of day, size of the cars, and type of interior, the students were able to eliminate potential confounding factors that could affect the temperature readings. This allowed them to accurately compare the temperatures inside the different colored cars and draw valid conclusions from their experiment.

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• 9.

### Plant growth was measured every day. Which one is the independent variable?

• A.

Plant growth

• B.

Every day

• C.

Height of plant

B. Every day
Explanation
The independent variable in this scenario is "every day." The independent variable is the factor that is manipulated or changed by the researcher in an experiment. In this case, the researcher is measuring plant growth every day, indicating that they are changing the variable of time to observe its effect on plant growth. Therefore, "every day" is the independent variable in this context.

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• 10.

### The farmer had a problem with his corn crop.  Every year, he is losing money because his crop is not marketable.  He chooses 3 different insecticides to test on a section of his corn crop.  He chose the insecticides because he thinks the insects are destroying his crop.  During the experiment he will measure the quality of his crop. What is the independent variable?

• A.

Corn crop

• B.

Amount of money

• C.

Different insecticides

• D.

Crop quality Back to top