Review for Quarter 1

Match the following

• Independent (test) variable

• The part that is changed by the scientist

• Control group

• The group that does not receive any changes in the experiment

• Dependent (Outcome) Variable

• The part that is measured in the experiment

• Constant

• The items that remain the same in the experiment

A researcher wants to study how the temperature of water affects the time it takes for sugar to dissolve. What is the dependent variable?

• The amount of sugar

• The time it takes to dissolve

• The temperature of the water

• The type of sugar

A student is investigating how the angle of a ramp affects the speed of a toy car. What is the independent variable?

• The speed of the toy car

• The weight of the toy car

• The angle of the ramp

• The length of the ramp

What is the difference between a scientific theory and a scientific law?

Why might a scientific theory change over time?

• New evidence is presented and many scientists can replicate the results

• One scientist proposes a change

• Laws of nature change

• Theories are permanent and do not change

What is a scientific law?

• An educated guess

• A proven theory

• A hypothesis that has been tested once

• A description of a consistent natural phenomenon

Which of the following best describes a scientific theory?

• A guess about how things work

• A law that describes a fact

• A detailed explanation supported by a large body of evidence

• A prediction of future events

What is a limitation of a scientific model?

• It can be adjusted to fit new data

• It may not be 100% accurate or may not have all the information

• It can predict future events accurately

• t is always an exact representation of reality

What is a benefit of using a scientific model?

• . It provides exact answers

• It is always correct

• t eliminates the need for experiments

• It helps visualize complex processes

Tags

NGSS.MS-ETS1-4

What makes a scientific question testable?

• It can be investigated through experiments or observations

• It is based on opinions

• It can be answered within a few minutes

• It is about an unobservable event

Tags

NGSS.MS-ESS3-5