Energy and transfer and resources

The kind of thermal energy transfer that travels through space in electromagnetic waves is ______________________.

• insulation.

• Radiation

• Conduction

• Convection

The type of thermal energy transfer that happens through direct contact of molecules or particles with each other is ___________________.

• Convection

• Conduction

• Radiation

• insulation.

___________________ is the type of thermal energy transfer that occurs in fluids, such as warm air rising and cold air sinking; creating wind.

• Convection

• Conduction

• Radiation

• insulation.

Which is the best surface for reflecting thermal radiation?

• Shiny white

• Dull white

• Shiny black

• Dull black

Which is the best surface for absorbing thermal radiation?

• Shiny white

• Dull white

• Shiny black

• Dull black

Why are fur and feather good at reducing thermal energy transfer?

• They are soft

• They have layers that trap air

• They are made of non-metals

• They are from animals

Thermal flasks, used to keep drinks warm, and double glazed windows contain a vacuum chamber. Why is this?

• To keep things clean

• To prevent contamination

• To reduce thermal energy loss via radiation

• To reduce energy loss via conduction and convection

Why does warm fluid rise?

• Particles lose energy, they move closer together, density increase

• Particles become less dense

• Particles gain energy, they move further apart, density decreases

• Particles gain energy, and their density decreases

Why is trapped air good at reducing thermal energy transfer?

• Air is a bad conductor and when trapped, it cannot create convection currents

• Air is a good conductor because the molecules are far apart

• Air likes to be trapped so when it is happy, it vibrates faster

• Radiation cannot pass through trapped air

What is a vacuum in science?

• Something used to clean your house

• A space with no particles

• A space with lots of particles in

• A space radiation cannot travel through