Science 7 Atmosphere, Buoyancy & Pressure

What is the unit for pressure?

• Newton per metre

• Newton

• Pascal

• Watt

What is the equation used to calculate pressure?

• pressure= force/mass
• pressure =mass/volume
• pressure=area/force
• pressure=force/area

Look at the pressure triangle. How do we calculate the area?

• f ÷ a
• f x p
• p x f
• f ÷ p

Pressure decreases when the surface area over which a force is applied increases

• True
• False

What pressure does a 4000N horse exert on the ground if each foot is 0.10 m²?

• 40 Pa

• 10000 Pa

• 400 Pa

• 10 Pa

Which exerts more pressure on the thumb?

• A

• B

What is the pressure of a 100N force over an area of 2.0m².

• 0.02 Pa

• 50 Pa

• 500 Pa

• 200 Pa

Does cold air rise or sink?

• Rise
• Sink

Tags

NGSS.MS-ESS2-5

NGSS.MS-ESS2-6

The force of a column of air pressing down is called what?

• Air Mass
• Air Pressure
• Air
• Heavy

The hot tin becomes dented when cold water was poured onto it. Which of the following causes the occurrence?

• Air pressure outside the tin has compressed it
• The volume of water in the tin has decreased
• Air pressure inside the tin has increased
• Air pressure outside the tin has decreased

Tags

NGSS.MS-PS2-5