Exploring Fluids with Bill Nye

What is a characteristic of all fluids?

• They take the shape of their container

• They can only flow downwards

• They are always visible

• They are always cold

Which of the following is NOT a fluid?

• Solid ice

• Water

• Air

• Both air and water

Why do objects shaped to reduce drag move more easily through air?

• They are always smaller

• They use less energy

• They are lighter

• They face less air resistance

What happens when air flows into the precisely shaped flow-containment annulus of a hovercraft?

• It stops moving

• It cools down

• It changes to a solid

• It lifts the hovercraft

What demonstrates that air is a fluid?

• It is always wet

• It can be poured

• It is very heavy

• It cannot be seen

What causes the hovercraft to lift off the ground?

• Heat from the ground

• Spinning blades inside

• Air pressure below it

• Magnetic force

What is convection in the context of fluids?

• Movement caused by temperature changes

• A cooling process

• Freezing of a liquid

• A type of chemical reaction

What happens to warm water in convection currents?

• It evaporates

• It sinks

• It freezes

• It rises

What happens when hot water is placed under cold water in the experiment?

• The bottles explode.

• Nothing happens, the water remains stable.

• The cold water rises and the hot water sinks.

• The hot water rises and mixes with the cold water.

Why do warmer fluids rise?

• Because they are more colorful.

• They actually sink, not rise.

• Because they are lighter.

• Due to faster-moving molecules.