Fact 1: Pollination requires pollinators. Fact 2: Most plants are either insect pollinated or wind pollinated. Given the two facts above, what can be required for plants to reproduce?
OPTIONS:
- Light
- seeds
- bees
- pH
- lipids
- wind
- energy
- sugar

Answer: wind

Fact 1: Carbon cycles quickly between organisms and the atmosphere. Fact 2: Carbon dioxide is controlled by the carbon cycle. Given the two facts above, what is controlled between organisms and the atmosphere?
OPTIONS:
- carbon dioxide
- sweating
- temperature
- air pressure
- heat energy
- Pollution
- energy usage
- Chemical energy

Answer: carbon dioxide

Fact 1: Erosion causes a river to become deeper and wider. Fact 2: Canyon formed as a consequence of river erosion. Given the two facts above, rivers cut deeper and wider to form what?
OPTIONS:
- canyons
- arteries
- Roads
- timberlands
- old growth forests
- soils
- Sediment
- coral reefs

Answer:
canyons