Question

A teacher opens a window on a cold day. Which statement explains why the room starts to feel cooler? (1 point)
Responses

The density of the air is lower on the inside than on the outside.
The density of the air is lower on the inside than on the outside.

The kinetic energy of the air molecules outside is higher than the kinetic energy of the air molecules inside.
The kinetic energy of the air molecules outside is higher than the kinetic energy of the air molecules inside.

Air moves from the areas of higher temperature to areas of lower temperature.
Air moves from the areas of higher temperature to areas of lower temperature.

Cold air is moving into the room from outside.

Answer 1

Cold air is moving into the room from outside.

Explanation: the incoming colder (lower‑energy, denser) air mixes with the warmer room air and lowers the room temperature; the denser cold air also sinks and displaces warmer air, so the room feels cooler.