| focus |
the point at which rays of light or heat come together or from which they seem to move away. [1/6 definitions] |
| furnace |
anything in which heat is made for a specific purpose by burning fuel. A furnace can be used to heat a building or to melt metal. |
| fuse2 |
to cause to become liquid by using heat; melt. [2/4 definitions] |
| gas |
a fuel in the form of a gas that is burned for heat, light, or cooking. [1/3 definitions] |
| geothermal |
having to do with the heat produced inside the earth. |
| greenhouse effect |
the warming of the earth's surface that takes place when heat from the sun is held in by the earth's atmosphere. The greenhouse effect can be caused by too much carbon dioxide being released into the air from the burning of fossil fuels. |
| heater |
a device that gives heat. Heaters are used to make water or the air in a building warmer. |
| hot |
holding or giving off great heat. [2/6 definitions] |
| huddle |
to move close together or push in against one another when sharing something such as heat. [1/5 definitions] |
| hydrogen bomb |
a very powerful type of bomb. When its hydrogen atoms are forced together under great heat and pressure, they release energy in a huge explosion. |
| igneous |
having to do with rocks formed by a volcano or other source of great heat. |
| ignite |
to subject to great heat; cause to glow with heat. [1/2 definitions] |
| incubator |
a machine that uses heat to hatch eggs. [1/2 definitions] |
| insulate |
to cover, line, or surround with a material that reduces or stops the movement of heat, electricity, or sound. |
| intense |
having a very great degree of something, such as heat, or being in a very great degree or state. [1/2 definitions] |
| melt |
to change from a solid to a liquid state through heat or pressure. [1/4 definitions] |
| metal |
any solid mineral element that exhibits certain characteristics such as the ability to conduct heat or electricity. Most metals may be shaped under heat or pressure. Iron, silver, copper, and gold are metals. |
| microwave |
a type of radio wave with a high frequency. Microwaves are used in special ovens to heat food and liquids. [1/2 definitions] |
| molten |
made liquid by very high heat. |
| overhead |
the general expenses of a business. Money spent for heat, rent, electricity, or taxes is part of the overhead of running a business. [1/3 definitions] |
| pasteurize |
to heat for a certain length of time. Food and drinks are pasteurized in order to kill most of the harmful bacteria. |