Plants need ______ to survive.

Plants use what things to produce their own food?

What is the process called when plants make their own food?

Plants are important to the survival of people because they

Plants release

If a large amount of trees are cut down in an area, what gas would decrease in that area?

Respiration is when

Animals expel carbon dioxide as part of

What do animals add to the atmosphere?

Oxygen levels decrease when

If an area has a higher amount of carbon dioxide than oxygen, it needs more

Plants use oxygen from the air to make food.

What would increase the amount of oxygen in the air?

Carbon dioxide and oxygen are transferred through

Plants absorb

The movement of carbon on Earth by the process of respiration and photosynthesis is called

What stage seems to be at rest?

A cocoon is a type of pupa.

Plants give out

Animals give out

Plants take in

Animals take in ________.

The stages of an organism's life from birth to death

Which stage resembles the adult?

The first stage in both life cycles is the egg.

Which life cycle has four stages?

An adult

The second stage of incomplete metamorphosis is

Both stages have an adult and nymph stage.

Complete metamorphosis has three stages

Which stage resembles a worm?