Science: Heat Transfer

Which two types of radiation below can people NOT see?

Infrared and Ultraviolet

Homes lose heat through walls, windows, and roofs via conduction. What can be done to slow down this heat loss?

Insulation

What happens to most of the radiation that reaches the Earth's surface?

It is absorbed by Earth and radiated back into the atmosphere to become heat

Electromagnetic radiation is made up of which TWO types of waves?

Magnetic & Electric

What is an example of radiation?

A campfire

Which would be a better choice if you were in need of something to roast your marshmallows with? A metal rod or twig. Why?

A tree twig would be a better choice, because wood is a poor conductor of thermal energy.

As you heat water, what is true about its density?

As temperature increases density decreases

What is the most common form of convection?

Boiling liquid

Most _____ in Earth's atmosphere happens at the Earth's surface.

Conduction

The transfer of energy through direct contact (touching) or molecular contact.

Conduction

What are the 3 ways of thermal energy transfer.

Conduction, Convection, and Radiation

What are the 3 ways that heat is transferred into our atmosphere?

Conduction, convection, and radiation

What is the keyword for CONDUCTION?

Contact

Smoke rising from a fire is an example of what kind of heat transfer?

Convection

The transfers of thermal energy by the movement of fluids or of density differences is ...

Convection

_____ objects absorb radiation faster.

Dark-colored

What is the keyword for COVECTION?

Density

All light waves travel at the same frequency

False

True or false? Radiation needs a material to travel.

False

The transfer of thermal energy through electromagnetic waves...

Radiation

What is the only type of heat transfer that can occur in the vacuum of space?

Radiation

What kind of thermal energy transfer roasts a marshmallow (Don't put it IN the fire)

Radiation

Radiation from the Sun transfers thermal energy to a person standing in sunlight. How you could move in order to stay cooler?

Staying in shady areas can help keep you cooler on a hot day.Your body also loses thermal energy to the environment by radiation.

What kind of room uses convection currents to help warm a house?

Sunroom

The thermal energy of a substance depends on the number of particles it contains and its ...

Temperature

The Earth's main source of thermal energy

The Sun

A cup of water and a pool of water have the same temperature. Which one has more thermal energy?

The pool because there is more water

When your body is too hot, it increases blood flow to your skin, where heat loss occurs.If you were hot on a sunny day what you you need to do in order to make you body temperature go down?

You may prefer to be on the ground floor rather than upstairs, because warm air rises through convection. Where the air is cooler downstairs, more thermal energy will transfer from your body to the air. You can also use a fan

True or False? Dark surfaces absorb and release thermal energy better than light-colored surfaces.

True

What type of radiation causes sunburn?

Ultraviolet (UV)

Thermal energy usually moves from ...

Warmer particles to cooler particles

What is the keyword for RADIATION?

Waves

Conduction takes place at your skin's surface, as thermal energy is transferred from your body to the air or anything in contact with your skin. If you were hot on a sunny day what you you need to do?

You might prefer standing on a tile floor rather than a rug. Tile is a better conductor of thermal energy, so it's easier for heat to flow from your feet into the tile. This conduction makes the tile feel cool.

When you heat air, it _____ and becomes less dense.

expands

Most of the electromagnetic radiation from the sun is ...

invisible

Conduction works best in ...

solids