Hot Air Balloons: How Do They Stay Aloft?

Question:

Based on the information provided, which of the following statements is FALSE?

A. Air goes up and out the top of a chimney when you light a fire.

B. Cool air collects about the ceiling when you open a refrigerator.

C. Smoke from a candle rises after you blow out the flame.

D. Cold air coming from an air conditioning vent settles about the floor.

Answer:

The false statement is 'B. Cool air collects about the ceiling when you open a refrigerator.' as cold air tends to fall while hot air rises.

The statement that is FALSE based on the information presented in the excerpt is 'B. Cool air collects about the ceiling when you open a refrigerator.' The explanation given in the excerpt explains that cold air tends to fall and hot air rises. In relation to a refrigerator, when it's opened, the colder air inside would tend to flow downwards, not collect at the ceiling. Examples of this principle like the hot air balloon, grocery store freezer, and the other provided options (A, C, and D) further illustrate this principle.