Fact 1: High temperatures can cause an object to combust. Fact 2: Incineration requires very high temperatures for efficient combustion. Given the two facts above, what causes an object to combust?
OPTIONS:
- heating liquids
- friction
- It gets heated up
- incineration
- heat energy
- flow of electrons
- Electrical energy
- Energy.

Answer: incineration

Fact 1: Chordates have a complete digestive system and a closed circulatory system. Fact 2: Vertebrates are members of of a larger group, the chordates . Given the two facts above, vertebrates have a complete digestive system and a what?
OPTIONS:
- Veins and arteries.
- lack of backbone
- bruised brain stem
- critical organs
- closed circulatory system
- incomplete circulatory system
- characteristics
- sensory neurons

Answer: closed circulatory system

Fact 1: Magnetism can cause objects to repel each other. Fact 2: Copper and aluminum are both attracted and repelled by magnets. Given the two facts above, what can attract copper?
OPTIONS:
- photons
- colors
- Energy.
- magnetism
- flowers
- hormones
- Light
- electrically

Answer:
magnetism