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

Front

What is buoyant force?

Back

The upward force exerted by a fluid on an object that is submerged or floating in it.

Front

What determines whether an object sinks or floats?

Back

An object's density compared to the density of the fluid it is in.

Front

What is the principle behind a curve ball in baseball?

Back

The Bernoulli principle, which states that an increase in the speed of a fluid occurs simultaneously with a decrease in pressure.

Front

How does pressure change with depth in a fluid?

Back

Pressure increases with depth in a fluid.

Front

What does Pascal's principle state?

Back

Pressure applied to a confined fluid is transmitted undiminished in all directions throughout the fluid.

Front

What is Archimedes' principle?

Back

An object submerged in a fluid experiences a buoyant force equal to the weight of the fluid displaced by the object.

Front

Define density in terms of mass and volume.

Back

Density is the mass of an object divided by its volume (Density = Mass/Volume).

Front

What happens to the buoyant force when an object is submerged deeper in a fluid?

Back

The buoyant force remains constant as long as the volume of fluid displaced does not change.

Front

What is the relationship between fluid speed and pressure according to Bernoulli's principle?

Back

As the speed of a fluid increases, the pressure within the fluid decreases.

Front

What is the effect of temperature on the density of a fluid?

Back

As temperature increases, the density of a fluid generally decreases.