Variables/Scientific Method

Mr. Henry sets up an experiment on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid; water, soda, tomato juice. In this investigation, what is the independent variable?

• all of the above

• Type of plant

• water, apple juice, milk

• plant growth

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

Mr. Henry normally uses praise as a reward to train his horse. He wants to know the best way to train his horse, so he sets up an experiment to find out if there is a better way to get his horseto respond to commands. What is his dependent variable?

• type of horse

• Type of reward

• Praise

• Amount of time the horse follows commands

Mr. Henry sets up an experiment to see how the mass of a baseball affects the distance it rolls off a . Identify the constant.

• distance traveled by the ball

• mass of the ball

• height of the ramp

• weight of the ball

What is the dependent variable (effect) in this experiment?

"Does eating breakfast improve test score?"

• eating breakfast or not

• the grade you go on the test

• what time you get up in the morning

• how tasty the breakfast is

What is the independent variable in this experiment?

"Which type of medium (soil or sand) is best for plant growth?

• height of plant (cm)

• amount of medium (soil or sand)

• types of plant

• type of medium (soil or sand)

What variable goes on the x (horizontal) axis?

• dependent variable

• control variable

• constant variable

• independent variable

Tags

NGSS.MS-PS3-1

What is the interval scale on this graph?

• 5

• 10

• 15

• 20

What is the unit of measure on this graph?

• Temperature

• Day

• Fahrenheit

• New York City

What is the relationship on this graph?

• Positive

• Negative

• No relationship

What is the relationship in the line graph?

• Positive

• Negative

• No relationship