No.
Most solids expand as they increase in temperature and contract as they get colder. Interestingly, water after it freezes will start to expand as it gets even colder.
No. air actually contracts as it gets colder, while air expands as it gets warmer. For example, lightning is so hot, it causes the air to heat up intensly. This rise in temperature causes the air to expand so fast, that it breaks the sound barrier. This causes a sonic boom, and that is the thunder that you hear after lightning strikes.
As you climb a mountain the air gets colder.
It lowers, not sinks.
an air conditioner because it warms up to make cold air
At higher elevations, the air pressure decreases, causing the air to expand and cool down. This drop in temperature is why it is colder at higher elevations.
heat causes warm air to occupy more space than colder air.
As you move higher up a mountain, the air pressure decreases. The decrease in pressure causes the air to expand, leading to a drop in temperature. This is known as adiabatic cooling, where the air cools down as it expands in lower pressure environments.
No. If a fixed quantity of any gas is heated, it will either expand or the pressure will increase. This is called Boyle's Law. So, if you have a balloon outside in the cold, and you bring the balloon inside, it will expand somewhat, because the balloon _CAN_ expand. If you have a rigid vessel and you heat it, the pressure increases. This is the basic idea behind a pressure cooker; a strong metal container with a lid that can tightly seal the pot. As you increase the temperature, the pressure will also increase.
Uhm, it gets colder of course....
As you get higher the air is thinning not expanding.
in the lower atmosphere the air gets colder with increasing altitude.