Fact 1: Earthworms are important deposit feeders that help form and enrich soil. Fact 2: Deposit feeders ingest sediment and then extract the food. Given the two facts above, what do earthworms ingest in order to form and enrich soil?
OPTIONS:
- segmented
- vegetation
- sediment
- bacteria
- Chlorophyll
- sandworm
- crawling
- dirt

Answer: sediment

Fact 1: Pollutants have a negative impact on the environment. Fact 2: Hydrocarbon emissions are one of the pollutants that create ozone pollution. Given the two facts above, what has a negative impact on the environment?
OPTIONS:
- forest is destroyed
- habitats
- animals
- oxygen
- deforestation
- movements in the earth's crust
- harmful substances
- hydrocarbon emissions

Answer: hydrocarbon emissions

Fact 1: Migration is a type of movement that changes population size. Fact 2: Insects can also migrate. Given the two facts above, what can change population size through movement?
OPTIONS:
- cows
- ducks
- goats
- animals
- relocation
- mammals
- fur seals
- insects

Answer:
insects