Matter and Energy in Ecosystems

What gas is released during photosynthesis?

• Carbon dioxide

• argon

• oxygen

• nitrogen

What gas is taken in during photosynthesis?

• Argon

• Nitrogen

• Oxygen

• Carbon dioxide

What is the primary role of decomposers in the cycling of matter in ecosystems?

• Absorbing sunlight

• Breaking down dead organisms and recycling nutrients

• Producing oxygen

• Consuming producers

What is the main purpose of cellular respiration in living organisms?

• To absorb sunlight

• To release energy from energy storage molecules (food)

• To create energy storage molecules

• To produce oxygen

During cellular respiration, which molecule is primarily broken down to release energy?

• Water

• Oxygen

• Glucose

• Carbon dioxide

What do animals give off during cellular respiration

• Sugar and Carbon dioxide

• Sugar and Oxygen

• Carbon dioxide and water

• Oxygen and Water

Tags

NGSS.MS-LS1-7

How do consumers get energy storage molecules?

• Absorbing sunlight

• breaking down dead organisms

• soaking it up from the ground

• feeding on other organisms

The sun has been up for several hours, and it has been shining on these trees. What can the trees do because they are in the sunlight? What does this mean for the number of energy storage molecules in the trees?

The trees can . . .

• give off carbon to the air. Giving off carbon allows them to make energy storage molecules.

• give off carbon to the air. Giving off carbon uses up energy storage molecules.

• take in carbon from the air. The carbon is used to make energy storage molecules.

• take in carbon from the air. The carbon is used to break down energy storage molecules.

Where does the energy for photosynthesis come from?

• carbon dioxide

• oxygen

• the sun

• glucose

Where do energy storage molecules come from?

• Atmosphere

• Producers

• Consumers

• Decomposers