Unit 2 Physical Science

What is a fluid?

• A solid substance that retains its shape

• A substance that can flow and take the shape of its container

• A gas that cannot change shape

• A liquid that is always frozen

What happens to pressure as depth increases in a fluid?

• Pressure decreases

• Pressure remains the same

• Pressure increases

• Pressure fluctuates

What does Pascal's Principle state about pressure in a fluid?

• Pressure decreases equally everywhere in a closed container.

• Pressure remains constant in a closed container.

• Pressure increases equally everywhere in a closed container.

• Pressure only increases at the point of application.

What is buoyancy?

• The downward force exerted by a fluid on an object

• The upward force exerted by a fluid on an object

• The sideways force exerted by a fluid on an object

• The rotational force exerted by a fluid on an object

Why do some objects float while others sink?

• Because of the object's color

• Because of the object's temperature

• Because of the buoyant force

• Because of the object's shape

Tags

NGSS.5-PS1-3

What does Archimedes' Principle state about the buoyant force on an object?

• It is greater than the weight of the fluid displaced.

• It is less than the weight of the fluid displaced.

• It equals the weight of the fluid displaced.

• It has no relation to the weight of the fluid displaced.

What does Archimedes' Principle help to explain?

• Why airplanes fly

• Why ships float and how hot air balloons work

• Why cars move

• Why plants grow

How can Archimedes' Principle be used to find the volume of an irregularly shaped object?

• By measuring its height

• By weighing it

• By submerging it in water and measuring the displaced fluid

• By calculating its surface area

What happens to objects that are less dense than the fluid they are in?

• They sink

• They float

• They dissolve

• They evaporate

What happens to objects that are more dense than the fluid they are in?

• They float

• They sink

• They become gaseous

• They remain suspended