Solar Heating Grade 7

Why is it necessary for the Water Tank to be insulated?

• The water needs to be protected.

• To prevent loss of heat

• To keep the water cold.

The solar heating system consists of a .................. tank.

• Iron

• Plastic

• Carbon

• Stainless steel

The Heat Exchanger has solar fluid which consists of water and ......... mixture.

• oil

• petrol

• anti-freeze

The water is heated by the solar

fluid in the heat exchanger by ...

• Convection

• Conduction

• Radiation

This is the direct transfer of heat by the electromagnetic

spectrum (Solar radiation). You can feel radiated heat coming off a fire.

• Convection

• Conduction

• Radiation

Heat energy is carried by moving the material

with its heat energy somewhere else.

• Convection

• Conduction

• Radiation

Name the type of current in the picture.

Name the container in which the solar fluid is heated by radiation.

The hotter solar fluid moves by

Convection to the top of the Heat ...............

and forces the cooler fluid down where it flows again into the collector to be heated again.

Another word for drinkable water is.........

• tap water

• potable water

• drinking water