*****8th Grade: Chapter 4 Test "Fluids & Forces"

Front

Why are the cabins of jet planes pressurized?

Back

Atmospheric pressure is less at higher altitudes.

Front

Any material with a density ____________________ water will float in water.

Back

less than.

Front

True or False: Whether an object sinks or floats depends on the volume of the object.

Back

False.

Front

This can cause a roof to lift off a house. (Match with the appropriate term)

Back

Bernoulli.

Front

50 mL of soda in a soda can exerts ____ 50 mL of soda in a 1L bottle.

Back

more pressure than.

Front

What is density?

Back

Density is the mass of an object divided by its volume.

Front

What principle explains why airplanes can fly?

Back

Bernoulli's principle states that an increase in the speed of a fluid occurs simultaneously with a decrease in pressure.

Front

What is buoyancy?

Back

Buoyancy is the ability of an object to float in a fluid.

Front

What does Pascal's principle state?

Back

Pascal's principle states that a change in pressure applied to an enclosed fluid is transmitted undiminished to all parts of the fluid.

Front

What is the relationship between pressure and area in fluids?

Back

Pressure is defined as force per unit area.