Nature of science review

A scientist studying plant growth uses 2 different fertilizers, and equal amounts of light and water. What type of variable is the water?

• Dependent

• Independent

• Controlled

• Outcome

What would be the independent variable in an experiment testing which types of paper airplane goes the furthest?

• the type of paper

• the type of airplane

• the distance of each plane's flight

• how hard the plane is thrown

Squidward used new reeds in his clarinet. He used an applause-ometer to measure the amount of applause after playing. What was the dependent variable?

• the song

• the reed

• the applause

• the clarinet

What is the independent variable?

• time

• velocity

• distance

Tags

NGSS.MS-PS3-1

What is the first step of the scientific method?

• Ask a question/identify a problem

• Make a hypothesis

• Research background info

• Draw a conclusion

In a controlled experiment, how many independent variables should be used?

• none

• one

• two

• However many make sense

Scientific theories....

• describe what happens in nature

• are explanations for why something happens

• make predictions

• are the same as hunches

On a graph, which axis shows the dependent variable?

• x-axis

• y-axis

• z-axis

Which of these statements is true about scientific laws and scientific theories?

• Laws are based on evidence while theories are not

• Theories only involve biology

• Theories use math to make predictions

• Both theories and laws are based on evidence

Why is it important to have only one independent variable?

• So you can tell which factor is causing the change in the experiment

• It does not matter, you can have as many independent variables as you want