Exploring Variables in Plant Experiments

Which of the following is an example of an independent variable in a plant growth experiment?

• The amount of sunlight each plant receives

• The height of the plant after two weeks

• The type of ruler used to measure the plant

• The color of the pot

Tags

NGSS.MS-LS1-5

What is the dependent variable in an experiment testing the effect of temperature on enzyme activity?

• The type of enzyme used

• The temperature at which the reaction occurs

• The rate of the enzyme-catalyzed reaction

• The size of the test tube

Tags

NGSS.HS-PS1-5

Which of the following is a control variable in an experiment testing how soil type affects water retention?

• The type of soil used

• The amount of water added to each soil sample

• The amount of water retained by the soil

• The time of day the experiment is conducted

Which factor is most likely to affect plant growth?

• The color of the plant label

• The amount of water the plant receives

• The shape of the pot

• The day of the week the plant is watered

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

What is the main effect of increasing temperature on enzyme activity, up to the enzyme's optimum temperature?

• Enzyme activity decreases

• Enzyme activity increases

• Enzyme activity remains the same

• Enzyme is destroyed immediately

Tags

NGSS.MS-LS1-7

Which soil type is likely to retain the most water?

• Sandy soil

• Clay soil

• Loamy soil

• Rocky soil

Tags

NGSS.MS-ESS2-4

In an experiment, you want to test how different amounts of fertilizer affect plant height. What is the dependent variable?

• The amount of fertilizer

• The height of the plant

• The type of plant

• The size of the pot

Tags

NGSS.MS-LS2-1

Which of the following best describes a control variable?

• The variable you change on purpose

• The variable you measure

• The variable you keep the same throughout the experiment

• The variable you ignore

Tags

NGSS.MS-PS2-2

If you are testing the effect of soil type on plant growth, which should be kept constant?

• The type of soil

• The amount of sunlight

• The type of plant

• Both B and C

What would be the best way to carry out an experiment to test the effect of temperature on enzyme activity?

• Use different enzymes at different temperatures

• Use the same enzyme and substrate, but change the temperature for each trial

• Change both the enzyme and the substrate for each trial

• Use different amounts of substrate at the same temperature

Tags

NGSS.MS-PS1-2

NGSS.MS-PS3-4