Understanding Atmospheric Pressure and Altitude

The video explains atmospheric pressure, caused by air molecules colliding with surfaces, and how it acts equally in all directions. It discusses the pressure inside and outside a can, emphasizing the need for balance to prevent collapse or explosion. The video also covers how pressure varies with altitude, increasing as we move deeper into the atmosphere due to the greater weight of air above, and decreasing as we ascend, due to reduced air density.

What causes atmospheric pressure on the Earth's surface?

• The weight of the air above us

• The temperature of the atmosphere

• The gravitational pull of the Earth

• The rotation of the Earth

How does pressure act on the surfaces of a tin can?

• It acts only horizontally

• It acts only vertically

• It acts equally in all directions

• It acts only inside the can

What would happen if the pressure inside a can is lower than outside?

• The can would collapse

• The can would expand

• The can would explode

• The can would remain unchanged

As we move higher in the atmosphere, what happens to the air density?

• It remains the same

• It increases

• It decreases

• It fluctuates

What is the relationship between altitude and atmospheric pressure?

• Pressure fluctuates with altitude

• Pressure remains constant with altitude

• Pressure decreases with altitude

• Pressure increases with altitude