Question: Fact 1: Most canyons are formed by flowing rivers through erosion over long periods of time. Fact 2: Canyon Lake Canyon lake was formed by dams on the Salt River. Given the two facts above, what can form canyons?
OPTIONS:
- spring
- storms
- dams
- mines
- salmon
- two
- rain
- cut
Answer: dams

Question: Fact 1: Contact between rocks over long periods of time causes rocks to smooth. Fact 2: Granite is rock formed by fire. Given the two facts above, contact between what over long periods of time causes them to smooth?
OPTIONS:
- graptolites
- Smooth music.
- Contact lenses.
- calcite
- Granite.
- loose soil
- rivers
- Time periods.
Answer: Granite.

Question: Fact 1: Most carcinogens cause cancer by producing mutations in DNA. Fact 2: Jet fuels are carcinogens. Given the two facts above, what in an airplane can mutate organisms?
OPTIONS:
- an anion
- Damages them
- Jet fuel
- light energy
- Toxicity
- Allergies
- kill them
- heat
Answer:
Jet fuel