Why does air in a room rise when it gains thermal energy from a heater? (1 point)
Responses
Its molecules move around more quickly, so there is more space between them, making it less dense than the air above it.
Its molecules move around more quickly, so there is more space between them, making it less dense than the air above it.
Its molecules move around more slowly, so there is more space between them, making it less dense than the air above it.
Its molecules move around more slowly, so there is more space between them, making it less dense than the air above it.
Warm air always rises.
Warm air always rises.
Its molecules move around more quickly, so there is more space between them, reducing its mass.
Its molecules move around more quickly, so there is more space between them, making it less dense than the air above it.
The correct response is: Its molecules move around more quickly, so there is more space between them, making it less dense than the air above it.
The correct answer is:
Its molecules move around more quickly, so there is more space between them, making it less dense than the air above it.
When air in a room gains thermal energy from a heater, its molecules become more energetic and move around more quickly. As a result, there is more space between the air molecules, which makes it less dense compared to the colder air above it. This difference in density causes the warm air to rise because it is lighter than the surrounding cooler air. This process is known as convection, where the hot air expands and rises, while the cool air contracts and sinks. So, warm air tends to rise naturally due to the difference in density caused by increased molecular motion.