Q: Fact 1: Abreathing mask is used for keeping harmful particles from entering the respiratory system. Fact 2: Air pollution is caused by the build-up of harmful gases and particles in the air. Given the two facts above, what does a gas mask keep out?

OPTIONS:
- disease
- The atmosphere
- heat energy
- air pollution
- energy barrier
- Bodily water
- Dehydration
- bacteria

A: air pollution

Q: Fact 1: Most plants grow roots down into the soil to absorb water and minerals. Fact 2: Plant roots begin to stabilize the soil against erosion. Given the two facts above, what is a positive effect of plant needs for water and minerals from soil?

OPTIONS:
- erosion prevention
- reducing acid rain
- It helps them survive
- agriculture
- nutrient deficiency
- water run-off
- erosion
- Exfoliation

A: erosion prevention

Q: Fact 1: Reptiles are a class of tetrapod vertebrates that produce amniotic eggs. Fact 2: Amniotes are the reptiles, birds, and mammals. Given the two facts above, what kind of eggs do birds have?

OPTIONS:
- animals
- insects
- amnotic
- seeds
- fertile
- made
- white
- warm

A: amnotic

Q: Fact 1: Wetlands are extremely important biomes. Fact 2: Marshes and swamps are wetlands. Given the two facts above, what are extremely important biomes?

OPTIONS:
- important habitats
- urban city
- remains of prehistoric life
- zoos
- water conservation
- Most plants
- manmade aqueducts
- marshes and swamps

A:
marshes and swamps