Physical Science, Forces in Fluids, Pre Assessment

When you put oil and water into the same container, the oil floats on the water because the oil

• is more dense
• is less dense
• has more volume
• has less volume

A helium balloon floats in air because

• there is more air than helium.
• helium is equally dense as air.
• helium is less dense than the air.
• helium is as dense as the air.

A plastic disk's density is less than corn syrup but greater than water. If you put the disk into a container with both liquids where would the disk go?

• Float on top of the corn syrup
• sink to the bottom of the container
• float in between the corn syrup and the water
• float on top of the water

When fluids flow from Area A to Area B then 

• Area A must have great mass.
• Area A must have great pressure.
• Area B must have greater pressure.
• Area B must have greater volume.

Fluid pressure is directed

• in all directions.
• only upward.
• only downward.
• always sideways.

Air bubbles rise in water to the surface because

• liquids cannot be compressed.
• the weight of the atmosphere pushes down on the water.
• pressure is the amount of force exerted on an area.
• water is 1,000 times denser than air.

What is the unit for pressure?

• Pa
• N
• g/mL
• m²

What is the unit for force?

• N
• Pa
• g/mL
• g/cm³

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

Forces can

• push or pull.
• only push.
• only pull.
• push, pull or shove.

Tags

NGSS.MS-PS2-1

Which of the following is not a fluid?

• air
• liquid water
• oil
• an ice cube