Heat transfer (1)

What happens when a cold drink sits in a hot room?

• It remains cold

• It gets warmer

• It starts boiling

• It starts to freeze

When two things are the same temperature:

• They have the same number of molecules

• Their molecules stop moving

• Their molecules move at the same average speed

• Heat transfer between the two things stops

When you heat a pot on a stove, the handle gets warm. Which type of heat transfer is responsible?

• Conduction

• Radiation

• Convection

• All of the above

Thermoses work because they minimize which kinds of heart transfer?

• Conduction and convection

• Conduction and radiation

• Convection and radiation

• Conduction, convection, and radiation

Heat from the Sun reaches Earth through which type of heat transfer?

• Conduction

• Radiation

• Convection

• All of the above

Convection currents occur:

• Only in liquids

• When a dense substance is warmer than a less dense substance

• In both liquids and gases

• Weakly in solids

All of the following are examples of convection currents, excerpt:

• Warm air rising in a house

• Cold water sinking to the bottom of the lake

• Water flowing through pipes

• Steam from hot soup rising into the air

What is the transfer of heat by movement of liquids or gases?

• Radiation
• Convection
• Conduction
• Heat

What are waves that can transfer heat through the vacuum of empty space?

• Electromagnetic waves
• Convection
• Conduction
• Heat

What is the transfer of heat by direct contact?

• Convection
• Electromagnetic waves
• Radiation
• Conduction