Chapter 5 Thermal Energy Lesson 2

Transmitting heat from radiators

Broadcasting radio and television

Absorbing by the skin

Growing plants without sunlight

Thermal energy is transferred from the flame to the handle by conduction.

Thermal energy is transferred from the handle to the flame by convection.

The handle emits thermal energy through radiation.

The handle absorbs energy only from the air.

Metals

Cloth

Copper

Wood

To allow the concrete to expand in high temperatures without cracking.

To make the sidewalks look more attractive.

To reduce the cost of construction.

To prevent water from seeping in.

It is designed to expand less and resist cracking when heated.

It is lighter than regular glass.

It is more transparent than regular glass.

It is cheaper to produce than regular glass.

Thermal expansion makes the fluid denser, causing it to sink, while contraction makes it less dense, causing it to rise.

Thermal expansion makes the fluid less dense, causing it to rise, while contraction makes it denser, causing it to sink.

Thermal expansion and contraction have no effect on fluid movement.

Thermal contraction makes the fluid less dense, causing it to rise, while expansion makes it denser, causing it to sink.

Used to broadcast radio and television

Used to cook food in a microwave

Used to transmit heat from radiators

Used to grow plants underwater