7th Grade Science CFE Review

What is the variable the is changed in an experiment?

• Control variable

• Independent variable

• Dependent variable

• Constant

The variable that is measured throughout the experiment is the ________________
Hint: It may change as a result of your testing.

• Controlled Variable
• Responsive Variable
• Dependent Variable
• Independent Variable

Tags

NGSS.MS-PS2-2

Catherine is testing which soil will help grass grow the tallest.  The height of the grown grass is the __ variable.

• constant (stays the same)
• independent (it's what you change)
• dependent (it's what you measure)

Tags

NGSS.MS-LS2-1

An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid; water, apple juice, or milk.  In this investigation, the independent variable is ...

• The type of plant
• The amount of sunlight
• The type of music
• The type of liquid

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

NGSS.MS-LS1-5

Mrs. Ahlers set up an experiment to see how the mass of a ball affects the distance it rolls off a ramp. What is the dependent variable?

• Distance traveled by the ball
• Height of the ramp
• Mass of the ball
• Where the experiment took place.

SC.7.N.1.2

Scientists frequently repeat the experiments of others scientists. Why is this important in science?

a. Scientists often ask each other for help in performing experiments.

b. Replication of experiments helps to confirm and verify results.

c. Scientists frequently perform other scientists’ experiments in order to practice their technique.

d. Repeating experiments is an effective way to make sure a laboratory is in optimal condition.

• a

• b

• c

• d

SC.7.N.1.2

Cara read an article on why repetition and replication are so important, but she did not understand the difference between them. Which of the following best explains the two terms?

a. Repetition is when a scientist repeats an experiment; replication is when a scientist conducts an experiment on genetic material.

b. Repetition is when a scientist does the same experiment a number of times; replication is when other scientists reproduce a scientist’s experiment.

c. Repetition is when a scientist publishes in more than one scientific periodical; replication is when another scientist reproduces another scientist’s results.

d. Repetition is when a scientist commits an error in an experiment the first time and must repeat it; replication is when a scientist repeats an experiment to make sure it is valid.

• a

• b

• c

• d

What happens if the results of a scientist's experiment are NOT similar to the results gathered by other scientists doing the same experiment at a later date?

• The results of the experiment are changed by the scientists.

• The results of the experiment are published in scientific journals.

• The results of the experiment are questioned by the other scientists.

• The results of the experiment are accepted by the scientific community.

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NGSS.MS-LS2-4

Which of the following is the correct chain of energy that takes place when a flashlight is turned on?

• chemical => electrical => light

• mechanical => electrical => light

• nuclear => chemical => light

• thermal => chemical => mechanical

Tags

NGSS.MS-PS3-5

What energy transformation occurs during photosynthesis?

• Chemical --> Radiant

• Thermal --> Chemical

• Radiant --> Chemical

• Mechanical --> Thermal

Tags

NGSS.MS-LS1-6