Interactions in Ecosystems

___________ hunt their prey and help control the size of the populations of these organisms.

• predators

• carivores

• invasive species

Invasive species can harm the environment by growing and spreading quickly in an area.

• carnivores

• invasive species

• decomposers

Mention an example of a biotic factor.

Why are producers the first organisms in a food chain?

Answer explanation

They are the first organisms in a food chain because the receive energy directly from the Sun.

What type of organism makes their own food using energy from the Sun?

• consumers

• decomposers

• producers

How are decomposers like consumers?

• They provide energy to the producers.

• They make their own energy from sunlight.

• They get their energy from producers or other consumers.

The primary source of energy is the _________.

• Sun

• Animals

• Herbivores

What does the arrows from a food chain represent?

• matter

• energy

The ___________ models how energy is transferred in an ecosystem.

• energy flow

• food chain

• food web

Plants need sugar to produce energy.

• True

• False

Answer explanation

Plants need sunlight to produce energy.