Features of good cup design

Light bounces back off of a mirror or a shiny surface, such as aluminum foil. That means...

• Light reflects back, away from the material.

• Light energy is absorbed by the surface of the material.

• Light is transmitted through the material.

If we can see through the material, that means...

• Light reflects back, away from the material.

• Light energy is absorbed by the surface of the material.

• Light is transmitted through the material.

If light goes to the material, gives it energy and warms it up, that means...

• Light reflects back, away from the material.

• Light energy is absorbed by the surface of the material.

• Light is transmitted through the material.

In this milk tea system, energy is flowing...

• In both directions.

• From the cold drink to the warm air outside.

• From the warm air into the cold drink.

When water evaporates from your skin, your skin becomes...

• warmer

• cooler

• no change

When water evaporates from Mr B's cup of coffee, the coffee becomes

• warmer

• cooler

• no change

A vacuum is ...

• a special material used to make a cup

• a space without any particles

• a space filled with air

Porous means ...

• ... that the material contains little holes.

• ... that a person is not rich (she is poor)

• ... that the material is very hard (not soft).

Warm air is less dense that cold air. That is why warm air rises. The movement of warm air (up) and cold air (down) is called...

• radiation

• conduction

• convection

• contraction

When particles collide (bump into each other), they transfer energy. This kind of heat movement is called...

• radiation

• conduction

• convection

• contraction