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

Front

What is the direction of the buoyant force on an object in a fluid?

Back

The buoyant force on an object is in the upward direction.

Front

What happens to the buoyant force as an object sinks in a fluid?

Back

The buoyant force remains the same.

Front

If a kilogram of feathers and a kilogram of iron are compared, which has a greater density?

Back

The kilogram of iron has a greater density because it occupies a smaller volume than the kilogram of feathers.

Front

What does it mean when an object is pushed underwater?

Back

It displaces an equal volume of water.

Front

What principle explains why dishwashing detergent comes out of a squeezed bottle?

Back

According to Pascal's principle, when a force is applied to a fluid in a closed container, the pressure in the fluid increases everywhere by the same amount.

Front

Define buoyancy.

Back

Buoyancy is the ability of an object to float in a fluid, determined by the upward force exerted by the fluid.

Front

What is density?

Back

Density is the mass of an object divided by its volume, often expressed in grams per cubic centimeter (g/cm³).

Front

Explain Pascal's principle.

Back

Pascal's principle states that when pressure is applied to a confined fluid, the pressure change is transmitted equally in all directions throughout the fluid.

Front

What is the relationship between mass and volume in terms of density?

Back

Density is the ratio of mass to volume; if mass increases while volume remains constant, density increases.

Front

What happens to the pressure in a fluid when it is compressed?

Back

The pressure in the fluid increases.