8th Grade Science Review

A scientific theory...

• is based on lots of evidence
• is not valid
• is not reliable
• has not been tested many times

Which of the following is an explanation for a natural phenomenon that is supported by a large body of scientific evidence?

• scientific theory
• scientific law
• hypothesis
• observation 

A scientific ____________ is a statement that describes what always happens under certain conditions in nature.

• law
• theory
• method
• variable

What is a law?

• Describes what happens
• Explains a process

When experimenting with the growth of a plant, a scientist uses three (of the same type of) plants, two different fertilizers, equal light, and equal water. What type of variable is the fertilizer?

• Dependent
• Independent
• Control
• Compound

Research Question: Does the type of gasoline put in a car effect how fast the car can drive. What is the independent variable?

• Type of gasoline
• which car the gas is put into
• how fast the car can drive
• how much gas is put into the car

Ms. S 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.

Tags

CCSS.6.EE.C.9

The independent variable is the ONE thing you _____.

• change
• keep the same
• experiment with
• investigate

Tags

CCSS.6.EE.C.9

Walker is testing which fertilizer will grow the tallest grass.  The height of the grown grass is the __ variable.

• constant (same)
• independent (changes)
• dependent (measured)

Why do scientists use the scientific method?

• To make sure they get credit for their discoveries.
• To make sure their results are valid and can be performed by other scientists.
• So that other scientist don't get mad at them