Unit 4: Energy & Transformations Review

What is the primary method of heat transfer in fluids (gases and liquids)?

• Conduction

• Convection

• Radiation

• Insulation

In which scenario would conduction be the most efficient?

• In a vacuum

• Across a metal bar

• Through a liquid

• Between two gases

What type of heat transfer is experienced when the sun warms your face?

• Conduction

• Convection

• Radiation

• Evaporation

Which of the following is true about convection currents?

• They can only occur in solids.

• They are caused by the uneven heating of a fluid, causing differences in densities.

• They transfer heat primarily through electromagnetic waves.

• They do not contribute to the Earth's weather patterns.

Which of the following examples involves radiation?

• Heating a tin can on a stove

• Using a hot water bottle to warm your feet

• Feeling the heat from a campfire without touching the flames

• Stirring a pot of soup to evenly distribute the heat

In the process of conduction, heat is transferred by:

• The movement of waves through space.

• The bulk movement of molecules within fluids.

• The direct contact of molecules transferring energy.

• The movement of air or liquid from one place to another.

Which of the following is an example of convection?

• Cutting a piece of hot pizza and feeling the knife get warm

• A lava lamp's blobs rising and falling as they heat up and cool down

• Ice cooling down a drink by direct contact

• A person getting a sunburn while sitting in the sun

Cold Pack on Person

• Heat is transferred from the cold pack to the person.

• Heat is transferred from the person to the cold pack

• The cold pack is getting colder. The person is getting warmer.

Molecules in cold things move more _________
than in hot things.

• quickly
• slowly
• happily
• merrily

In heat transfer, heat always flows from the _______________ substance to the _______________ substance.

• Hotter to colder
• Colder to hotter
• Hotter to hotter
• Colder to colder