Q: Fact 1: Mollusks have a circulatory system with one or two hearts that pump blood. Fact 2: Clams are mollusks that live in the sea or in freshwater. Given the two facts above, what have a circulatory system with one or two hearts that pump blood? | OPTIONS:
- a fish
- aorta
- bacteria
- animals
- clams
- plants
- sharks
- Birds
A: clams

Q: Fact 1: Most plants continue to grow throughout their lives. Fact 2: Lilies continually produce new bulbs, from which grow new plants. Given the two facts above, what continues to grow throughout their lives? ? | OPTIONS:
- potatoes
- Hemoglobin
- tortoises
- plastic roses.
- Human teeth.
- Lilies.
- Silk daisies.
- vegetation
A: Lilies.

Q: Fact 1: If heat is conducted to an object then that object will become hot. Fact 2: Metals conduct heat well. Given the two facts above, what can make objects heat up well? | OPTIONS:
- wool
- metal
- paper
- rubber
- the sun
- a prism
- Light
- energy
A: metal

Q: Fact 1: If an animal lives under ground then that animal will be protected from a wild fire. Fact 2: Prairie dogs live in underground burrows. Given the two facts above, what are prairie dogs protected from? | OPTIONS:
- colder weather
- deforestation
- sun's heat
- disease
- threatened
- a wild fire
- A virus
- cold air
A: a wild fire