Fact 1: Hair is a fiber that is found only in mammals. Fact 2: All mammals have fur or hair. Given the two facts above, what is unique to mammals?

OPTIONS:
- fur
- magnetism
- eyes
- scales
- hair
- skin
- wool
- cats

Answer: fur

Fact 1: Damming a river can cause a lake to form. Fact 2: You can also water ski on Lake Mohave north of Davis Dam. Given the two facts above, to open more areas for water skiing, engineers could?

OPTIONS:
- dam more rivers
- to move people
- protect them
- vacation in Norway
- Move to another area
- build more snow machines
- scrap all steam locomotives
- Electric generators

Answer: dam more rivers

Fact 1: The surface of a beach is formed by mechanical weathering. Fact 2: Each beach experiences different rates of beach erosion. Given the two facts above, what rate does weathering happen?

OPTIONS:
- ligt
- mild
- Winter
- dangerous
- down
- varying
- flooding
- cycles

Answer: varying

Fact 1: Veins generally carry deoxygenated blood. Fact 2: Blood returns to the heart by the veins. Given the two facts above, what supplies the heart?

OPTIONS:
- organ
- Energy
- veins
- ovaries
- glucose
- oxygen
- sugar
- alveoli

Answer:
veins