Q: Which form of energy is needed to change water from a liquid to a gas?

OPTIONS:
- heat
- mechanical
- chemical
- sound
A: heat
Q: A student standing near a campfire feels warmer as the fire grows. Which process most likely transfers heat from the campfire to the student?

OPTIONS:
- conduction
- convection
- radiation
- transformation
A: radiation
Q: A student wraps a wire around an iron nail. The student then connects the wire to a battery. The nail attracts another nail and they stick together. What force holds the two nails together?

OPTIONS:
- gravitational force
- magnetic force
- electric force
- friction force
A: magnetic force
Q: The surface of Earth is covered by a relatively thin layer of water called the

OPTIONS:
- crust
- mantle
- hydrosphere
- atmosphere
A:
hydrosphere