Question

Look carefully at the picture above. The red arrows indicate that the water is gaining thermal energy and rising. Which of the following is NOT true about this scenario?

(1 point)
Responses

The heated water is more dense, which is why it rises.
The heated water is more dense, which is why it rises.

The water molecules closest to the burner move around more quickly when they are heated.
The water molecules closest to the burner move around more quickly when they are heated.

The heated water molecules have more space between them.
The heated water molecules have more space between them.

The action of the water is considered convection
The action of the water is considered convection
Question 2
Consider the same pot above. What happens to the water molecules as they reach the surface of the pot?(1 point)
Responses

They remain at the same temperature.
They remain at the same temperature.

They lose thermal energy.
They lose thermal energy.

They gain thermal energy.
They gain thermal energy.

They evaporate into the air.
They evaporate into the air.

Answer 1

Q1 — The statement that is NOT true:
- "The heated water is more dense, which is why it rises." (Heated water is less dense, so it rises.)

Q2 — Correct answer:
- "They lose thermal energy." (At the surface the water cools, loses heat, becomes denser and can sink.)