Bouyancy

Buoyancy is:

• When an object sinks in liquid

• The ability to float in some liquid material

What is buoyant force?

• An upward force exerted by fluids on an object.
• An downward force exerted by fluids on an object.

If an object is neutrally buoyant it will ________.

• sink

• float

• neither float or sink

• objects cannot be neutrally buoyant...

What is the formula for density?

• density = mass x volume
• density = mass / volume
• density = mass + volume
• density = mass - volume

Which box has a higher density?  

• Box A
• Box B
• cannot be determined
• they are the same

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.

Which item will float on the surface of the water?

• paper

• paper clip

• eraser

• rock

How can a student sink a cork?

• attach items to the cork that will sink to the bottom

• attach items that will float like the cork

In plain water, the egg sank. In salt water the egg floated. How did adding salt to the water change it?

• it made the water less dense

• it made the water more dense

The weight of the water displaced equals the upward force of water on an object

• Pressure
• Inertia
• Archimedes' Principle
• The Law of Water