Science Ch. 4 Review

What is a fluid?

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

• a solid material that maintains its shape

• a type of energy

• a chemical reaction

Which of the following are the two main types of fluids?

• solids and gases

• liquids and gases

• liquids and plasmas

• gases and plasmas

What is the SI unit for measuring pressure?

• newton

• joule

• pascal

• watt

How can you decrease pressure on an object?

• increase the force applied

• decrease the surface area

• increase the surface area

• increase the objects mass

Where does pressure increase in a fluid?

• at higher altitudes

• with depth

• near the surface

• in warmer regions

What is atmospheric pressure?

• pressure exerted by water

• pressure exerted by the Earth's atmosphere

• pressure inside a vacuum

• pressure inside a sealed container

What is density?

• the volume of an object

• the mass of an object

• the amount of force per area exerted on an object

• the mass per unit volume of a substance

What is the approximate density of water?

• 0.5 g/cm³

• 1.0 g/cm³

• 1.0 m/s

• 0.5 m/s

How do you know if an object will sink in water?

• if its lighter than water

• if its heavier than water

• if its density is less than water

• if its density is more than water

What is the buoyant force?

• the force that pushes an object downward in a fluid

• the upward force exerted by a fluid on an immersed object

• the force that causes objects to accelerate

• the force that keeps planets in orbit