fact and question: weathering usually occurs over a period of many years
Question: A thing that is weathered from a large item to tiny items has existed for an amount of time over between

What's the answer? OPTIONS:
- a week and a month
- a month and a decade
- a day and some weeks
- a minute and an hour

answer: a month and a decade

fact and question: large trees block sunlight from reaching the ground
Question: If the ground is fully shaded, and plants there barely grow, likely the reason is

What's the answer? OPTIONS:
- water there is clean
- people there are silly
- oaks there are mighty
- birds there are fat

answer: oaks there are mighty

fact and question: plants are a source of oxygen through photosynthesis
Question: Chloroplasts in shrubs scrub carbon from the air and return

What's the answer? OPTIONS:
- breathable air
- tears
- sweat
- water

answer: breathable air

fact and question: as population of predators decreases , the population of prey will increase in an environment
Question: When a predator population decreases in an environment, what happens to other populations?

What's the answer? OPTIONS:
- prey numbers will boom
- the amount of prey will go down
- new predators will arrive
- all populations will increase

answer:
prey numbers will boom