Question: Fact 1: Afire requires oxygen to burn. Fact 2: Building destroyed by fire. Given the two facts above, what is required to burn a building?
OPTIONS:
- oxygen
- voltage
- sigh
- ghost
- words
- sunlight
- heat
- power
Answer: oxygen

Question: Fact 1: Avalley is formed by a river flowing. Fact 2: Rivers erode the rocks they flow over. Given the two facts above, what is created when rocks erode?
OPTIONS:
- calcite
- A pond
- A valley
- detritus
- fossil fuels
- A river
- A volcano
- a prism
Answer: A valley

Question: Fact 1: Alaser is used for producing light. Fact 2: Light contains energy. Given the two facts above, what is produced by a laser?
OPTIONS:
- work
- Collagen
- emissions
- a wave
- sound
- noise
- energy
- unique
Answer:
energy