4.10 Unit Test Review: Fluid Forces

Why do solids maintain their shape, whereas fluids do not?

• • because the molecules in solids maintain a regular pattern and only vibrate, or move very slowly

• because solids are denser than fluids

• because the molecules in solids maintain a regular pattern and move very rapidly

• because solids are under greater pressure than fluids

Tags

NGSS.MS-PS3-4

What is a change that will not affect the pressure in a container?

• changing the weight of the fluid

• heating or cooling the fluid

• increasing the volume of the fluid

• changing the material that the fluid´s container is made of

What happens to the pressure in a sealed container if the amount of a gas in the container increases?

• Pressure decreases.

• Pressure increases.

• Pressure increases and then quickly decreases.

• Pressure stays the same.

What is the correct definition of buoyancy?

• the force on an object that is produced by the surrounding fluid and that pushes the object down

• the force of gravity on an object that is floating

• the force on an object that is produced by the surrounding fluid and that pushes upward on the object

• the force on an object that is produced by air pressure

What does buoyancy depend on?

• the density of the surrounding air and the density of the water

• • the density of the object and the force of gravity

    the density of the object and the force of gravity - no response given

• the density of the object and the density of the fluid

• atmospheric pressure and the density of the object

What will an object do if its density is less than the density of water?

• float

• sink

• bob up and down

• move forward

Which characteristic of a fluid affects the pressure in that fluid?

• the amount of hydrogen atoms in the fluid

• the amount of oxygen atoms in the fluid

• the gravity of the fluid

• the weight of the fluid

What will happen if a container filled with gas is heated?

• The internal pressure will increase.

• The internal pressure will decrease.

• The movement of molecules will slow.

• The gas will escape.

Tags

NGSS.MS-PS1-4

What happens to pressure when it is applied to an enclosed fluid?

• It is not transmitted.

• It is transmitted evenly to every part of the fluid and to the sides of the container.

• It is higher in some places and lower in others.

• nothing

Which aspect of an object was related to buoyancy in the "Density and Buoyancy" lab?

• • size

• mass

• weight

• density