CU6: Pressure

Front

What is air pressure?

Back

Air pressure is the force exerted by the weight of air molecules above a surface. It decreases with increasing altitude.

Front

How does altitude affect air pressure?

Back

Air pressure decreases as altitude increases.

Front

What happens to water pressure as you go deeper underwater?

Back

Water pressure increases as you go deeper underwater.

Front

What is the principle behind drinking through a straw?

Back

Drinking through a straw works by creating a difference in air pressure; when you suck the air out, the pressure inside the straw decreases, allowing atmospheric pressure to push the liquid up.

Front

Why can gases be compressed?

Back

Gases can be compressed because their particles are very far apart, allowing them to be pushed closer together.

Front

What is volume?

Back

Volume is a measurement of the amount of space an object occupies.

Front

What is the relationship between pressure and volume in gases?

Back

According to Boyle's Law, pressure and volume are inversely related; as volume increases, pressure decreases, and vice versa.

Front

What is atmospheric pressure?

Back

Atmospheric pressure is the pressure exerted by the weight of the atmosphere above a given point, typically measured in millibars or inches of mercury.

Front

What is the formula for calculating pressure?

Back

Pressure (P) is calculated using the formula P = F/A, where F is the force applied and A is the area over which the force is distributed.

Front

What is the effect of temperature on gas pressure?

Back

According to Gay-Lussac's Law, gas pressure increases with an increase in temperature if the volume is held constant.