Natural Sources of Energy
Is central heating a natural source of energy? Yes or no?
No
Where does solar energy come from?
The sun.
The object used to control heaters - turning them on and off - is called a
Thermostat
Your room is warmed by the sunlight through a window on a cold winter day. This is an example of what?
Passive solar heating.
The material in the walls of a building, designed to keep the interior cool in the summer and warm in the winter, is called
Insulation
Geysers, volcanoes and hot springs all get their heat from the following source.
Geothermal energy
Collector, storage, and distribution. These are all part of what?
Active solar heating.
There is a hot container in the oven that has absorbed lots of heat energy. It would be best to use an oven mitt to remove the container. This is because the oven mitt is a
Good insulator.
The bending of one of the metals when the temperature changes due to volume changes in one of the metals. This describes what?
A bimetallic strip.
Is a gas furnace part of a central or local heating system?
Central heating system.
Composting, or the breakdown of dead plants and animals is called what?
Decay
_____________________ is the energy given off by the sun. It is produced by the nuclear reactions that take place inside the sun.
Radiation
Most newer homes use _____________________ heating.
Forced-air
More confined heating, dealing with only one room or small area, is referred to as...
Local heating system.
An _____________________ is a number given to an insulator. The higher the number, the better the insulator.
R-value
Solar cells arranged in panels form a _____________________.
Solar panel