3. Trophic Levels

Question 1

Living organisms obtain

Answer 1

Matter and energy.

Question 2

Living organisms use matter for

Answer 2

For building new cells and creating new cells (growing).

Question 3

Living organisms use energy for

Answer 3

For every chemical reaction and for body motion.

Question 4

Three trophic levels in ecosystems

Answer 4

Producers, consumers and decomposers.

Question 5

Producers

Answer 5

Autotrophs are the producers because they make their own food by photosynthesis. They transform inorganic matter into organic matter.

Question 6

Consumers

Answer 6

Consumers need to feed on other organisms or on organic matter. They can be hervibores (primary consumers), carnivores (secondary consumers) or omnivores (secondary and tertiary consumers).

Question 7

Decomposers

Answer 7

They eat all the remains and wastes of other organisms and death matter. They transform the organic matter into inorganic matter that can be used by producers again.