Fact 1: Loud noises can cause animals to startle. Fact 2: Thunder is a rich source of loudness. Given the two facts above, what can cause animals to startle?

OPTIONS:
- Electrical
- thunder
- sleeping
- rapid breathing
- dogs
- influenza
- vehicles
- Pollution

Answer: thunder

Fact 1: Mutations that lead to cancer usually occur in genes that control the cell cycle. Fact 2: Mutations in genes that control the cell cycle are found in virtually all cancer cells. Given the two facts above, where are mutations found?

OPTIONS:
- alleles
- fossils
- retina
- skin
- embryos
- ovaries
- genes
- eggs

Answer: genes

Fact 1: Gills are used for breathing water by aquatic animals. Fact 2: All aquatic animals require dissolved oxygen to breathe. Given the two facts above, what do aquatic animals need to survive?

OPTIONS:
- Water
- gills
- food
- air
- fishing
- desert
- history
- warmth

Answer: gills

Fact 1: Being burried under soil and mud changes peat into coal through extreme heat and pressure in a swamp over a long period of time. Fact 2: Swamp vegetation was compressed to form coal. Given the two facts above, what is compressed into coal over long periods of time?

OPTIONS:
- an object
- bottom of feet
- energy
- carbon dioxide
- rays or beams
- kinetic energy
- electricity
- vegetation

Answer:
vegetation