Fact 1: Grasses supply most of the food consumed by people worldwide. Fact 2: Because food contains energy. Given the two facts above, what contains most of the energy used by people worldwided?

OPTIONS:
- heat
- Light
- coal
- grasses
- Cooking
- glucose
- A computer
- gasoline

Answer: grasses

Fact 1: Wiring requires an electrical conductor. Fact 2: Most electrical conductors, such as wires, are made of copper or gold. Given the two facts above, wiring requires copper or what?

OPTIONS:
- LEDs
- energy
- H20
- fibers
- SO2
- motors
- gold
- tube

Answer: gold

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

Fact 1: Evaporation can be used for separating a solute from a solvent in a solution. Fact 2: An aqueous solution has water as the solvent. Given the two facts above, evaporation can be used for separating a solute from a water in what?

OPTIONS:
- molecule
- Condensation
- atom
- aqueous solution
- Heat energy
- vaporization
- evaporation
- aqueous chemical

Answer:
aqueous solution