Fact 1: Flowing water can slowly dissolve carbon in sedimentary rock. Fact 2: Sedimentary Rocks One of the commonest sedimentary rocks is sandstone. Given the two facts above, flowing water can slowly dissolve carbon in what?

OPTIONS:
- oil
- water
- crust
- ice
- loose dirt
- sandstone
- precipitation
- loose soil

Answer: sandstone

Fact 1: Some viruses can cause cancer. Fact 2: Leukemias are cancers of the blood. Given the two facts above, what can some viruses cause?

OPTIONS:
- extinction
- anemia
- wounds
- leukemia
- Allergies
- loss of gravity
- Dehydration
- virus protection

Answer: leukemia

Fact 1: Biofuel is used to produce electricity by burning. Fact 2: Biofuels include ethanol, methanol, biodiesel, biocrude, and methane. Given the two facts above, what does methane produce when burned?

OPTIONS:
- carbon dioxide
- energy
- electricity
- The atmosphere
- heat energy
- adding heat
- It expands
- kinetic energy

Answer: electricity

Fact 1: Most arthropods are insects. Fact 2: Arthropods Arthropods have jointed segmented exoskeletons. Given the two facts above, what have jointed segmented exoskeletons?

OPTIONS:
- insects
- mountains
- tortoises
- barnacles
- humans
- crocodiles
- knee joints
- animals

Answer:
insects