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Because the wind moves tree branches.
Because if there was no air, you wouldn't be able to breath. Also, no wind or sound.

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Why is it important to know air expands when heated?

It is important to know that air expands when heated because this principle is fundamental to understanding processes like convection, weather patterns, and the behavior of gases. It also informs the design of systems like engines, HVAC systems, and hot air balloons. Understanding how air expands when heated helps us predict and control these phenomena in various applications.


Why does the air get thinner at the peak of climbing a mountain?

At high altitudes on mountains, the air pressure decreases because there is less atmosphere above pressing down. This reduction in air pressure means there are fewer molecules of air per unit volume, resulting in thinner air.


How do you know that the air you breathe is matter even though you can and rsquot see it?

Air is matter because it has mass and occupies space. You can feel the effects of air, such as when the wind blows or when you breathe in and out. Even though you can't see air, you can observe its effects on objects like leaves moving or balloons floating.


What happens to the air in a balloon if it bursts?

When a balloon bursts, the air inside rapidly escapes due to the sudden release of pressure. The air disperses into the surrounding environment, resulting in a loud popping sound and the deflation of the balloon.


How do you know the air you breathe is matter even if you can't see it?

Air is matter because it has mass and takes up space. When you exhale, you can feel the force of air leaving your lungs, which demonstrates that air has mass. Additionally, air exerts pressure on objects as it pushes against them, further showing its physical properties as matter.