Area Temperature

Question

X 22
Y 18
Z 18
Air will move from _____.
area X to area Z
area Y to area X
area Y to area Z
area Z to area Y

Answer 1

Air moves from areas of higher temperature to areas of lower temperature. In this case, the temperatures are as follows:

• Area X: 22°C
• Area Y: 18°C
• Area Z: 18°C

Since area X has the highest temperature (22°C), air will move from area X to both areas Y and Z, as they both have lower temperatures (18°C). However, the primary comparison for movement would typically be from the highest temperature area to the next lower one.

Therefore, air will primarily move from area X to area Y or area Z.

If forced to choose one specific option from the given choices, it would be:

• area X to area Z, as it represents the movement from the warmest area to a cooler one.

But it's also valid that air moves from area X to area Y as well.

Answer 2

Area Temperature
downstairs 22
upstairs 26
Which statement best explains the temperature difference?
The cooler air downstairs loses energy to the environment.
Energy from the cooler air is transferred upstairs.
Energy is transferred between the areas when the molecules touch.
Warm air rises by convection to the upstairs.

Answer 3

The best statement that explains the temperature difference between downstairs (22°C) and upstairs (26°C) is:

Warm air rises by convection to the upstairs.

This statement accurately describes the principle of convection, where warmer air, being less dense, rises and is replaced by cooler air from downstairs. As a result, the upstairs area tends to become warmer than the downstairs area.

Answer 4

Which option is an example of heat transfer by conduction?
air getting warm from a radiator
air conditioner cooling the room
person getting warm from an electric blanket
pavement heating up in the sun

Answer 5

An example of heat transfer by conduction is:

Person getting warm from an electric blanket.

Conduction is the process of heat transfer through direct contact between materials. In this case, the electric blanket heats up and directly transfers heat to the person lying on it. The other options involve other mechanisms of heat transfer, such as convection (air getting warm from a radiator) and radiation (pavement heating up in the sun).