Photosynthesis Assessment 1.1-1.6

What gas is taken in during photosynthesis?

• Argon

• Nitrogen

• Oxygen

• Carbon dioxide

What gas is released during photosynthesis?

• Carbon dioxide

• argon

• oxygen

• nitrogen

Where does the energy for photosynthesis come from?

• carbon dioxide

• oxygen

• the sun

• glucose

In what part of the cell does photosynthesis take place?

• nucleus

• chloroplast

• cytoplasm

• mitocondria

How do consumers get energy storage molecules?

• Absorbing sunlight

• breaking down dead organisms

• soaking it up from the ground

• feeding on other organisms

Decomposers are important to ecosystems because they...

• return vital nutrients to the ecosystem

• capture energy from the Sun

• are producers

• can be omnivores

What happens to the amount of carbon in an ecosystem as it moves through an ecosystem?

• Amount of Carbon increases

• Amount of Carbon decreases

• Amount of Carbon stays the same

• New Carbon is created when old carbon decomposes

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.

This tortoise is eating cactus on a sunny day. Is carbon moving into the air, moving out of the air, or both?

• Carbon is not moving into the air; it is only moving out of the air.

• With this information, there is no way to know for sure.

• Carbon is only moving into the air; it is not moving out of the air.

• Carbon is moving into the air and out of the air at the same time.

A scientist set up an experimental ecosystem in a sealed room with no windows. The experimental ecosystem has plants, and animals that eat those plants. The scientist can control whether the room is light or dark with a light switch outside the room.

The amount of carbon in the air of the ecosystem started out low. Then the amount of carbon in the air started to increase. Is the increase because the scientist switched the light on or because she switched the light off? What happened to the number of energy storage molecules in the living things?

The scientist . . .

• switched the light off, and the number of energy storage molecules in the living things decreased.

• switched the light off, and the number of energy storage molecules in the living things increased.

• switched the light on, and the number of energy storage molecules in the living things increased.

• switched the light on, and the number of energy storage molecules in the living things decreased.