Oxygen and decomposition

What was the independent variable in the experiment?

• Amount of additional Oxygen

• Plant matter %

• Decomposition Time

• The type of plant

What was the dependent variable in the experiment?

• amount of additional oxygen

• Plant Matter %

• Decomposition time in days

• Amount of yeast

What were the scientists trying to figure out?

• What temperature plants decompose

• If oxygen levels impact the rate of decomposition

• If decomposing plants produce more oxygen

• How much CO2 is produced

What variables were controlled? (select all that apply)

• amount of oxygen

• temperature

• time

• starting amount of plant matter

True or False: Anaerobic means conditions with very low or no oxygen.

• True

• False

True or False: Decomposition is faster when there is less oxygen.

• True

• False

Tags

NGSS.MS-LS2-3