Thermal Energy Transfers and Conductivity

When two materials that are in contact have the same temperature, the materials are said to be in thermal _____.

• equilibrium
• balance
• temperature
• density

Heat always moves from _____ objects to _____ objects.

• warmer; cooler
• cool; hot

• cold; hot

• cold; cool

Hot water is poured into a mug and the mug gets hot. This is an example of which type of energy transfer?

• radiation
• conduction
• convection
• This is not an energy transfer.

Radiation transfers energy by moving matter through direct contact.

• True
• False

A hot iron is turned off and cools down to room temperature. The iron cools because _____.

• the iron does not hold heat very well
• the room transfers cold energy to the iron
• thermal energy is transferred from the warm iron to the cooler room
• the thermal energy is destroyed during an interaction with the room

Which type of energy transfer allows the Sun to warm Earth?

• conduction
• convection
• radiation
• transmission

Which type of energy transfer is responsible for the movement of magma in Earth's interior?

• conduction
• convection
• radiation
• melting

The measure of the average kinetic energy of the particle of a substance is its

• temperature
• density
• heat
• viscosity

What type of material best increases thermal energy in a solar cooker?

• cardboard because it absorbs heat
• aluminum foil because it reflects heat
• aluminium foil because it absorbs heat
• cardboard because it reflects heat

Hot objects began to cool as

• cooler air is transferred to the hotter object
• atoms in the object react with the oxygen in the air
• thermal energy in the object is transferred to the surrounding air
• thermal energy in the object cancels out energy in the surrounding air