Interactions in the ecosystem

Which of the following is a biotic factor in an ecosystem?

• Soil

• Grasshopper

Which factor is abiotic?

• Fish

• Rainfall

Which pair correctly shows one biotic and one abiotic factor?

• Frog and Lily pad

• Tree and Air

Which of these would stop a plant from surviving?

• Fewer birds

• No sunlight

How is the abiotic factor helping the owl?

• The tree trunk gives shade and keeps the owl safe from weather.

• The owl eats the tree bark.

Why does the crab dig into the sand?

• To make sandcastles

• To hide from strong waves

How do plants depend on sunlight?

• To protect from animals

• For making food through photosynthesis

How does soil (abiotic) help plants (biotic)?

• It creates shade.

• It gives nutrients and holds the plant in place.

How do earthworms (biotic) support the soil (abiotic)?

• By making it hard

• By mixing and adding nutrients to it

What would happen if there were no rain for a long time?

• Plants would dry out and animals would lose food.

• The soil would get more fertile.