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Answer:
1. calorific value (plural calorific values) The amount of energy produced by the complete combustion of a material or fuel. Measured in units of energy per amount of material, e.g
2. There must be Fuel to burn. There must be Air to supply oxygen. There must be Heat (ignition temperature) to start and continue the combustion process.
3. People need some natural resources to stay alive. They use others to make their lives better. We have to conserve our natural resources since many of them are limited. Conserve means to protect something from harm or destruction.
4. The greenhouse effect is the process by which radiation from a planet's atmosphere warms the planet's surface to a temperature above what it would be without this atmosphere. Radiatively active gases in a planet's atmosphere radiate energy in all directions.
5. Natural resources are materials from the Earth that are used to support life and meet people's needs. Any natural substance that humans use can be considered a natural resource. Oil, coal, natural gas, metals, stone and sand are natural resources.
Explanation:
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Answer:
1) Noun. calorific value (plural calorific values) The amount of energy produced by the complete combustion of a material or fuel. Measured in units of energy per amount of material, e.g. kJ/kg.
2) There must be Fuel to burn. There must be Air to supply oxygen. There must be Heat (ignition temperature) to start and continue the combustion process.
3) Ten Simple Things You Can Do to Help Protect the Earth
Reduce, reuse, and recycle. Cut down on what you throw away. ...
Volunteer. Volunteer for cleanups in your community. ...
Educate. ...
Conserve water. ...
Choose sustainable. ...
Shop wisely. ...
Use long-lasting light bulbs. ...
Plant a tree.
4) the trapping of the sun's warmth in a planet's lower atmosphere, due to the greater transparency of the atmosphere to visible radiation from the sun than to infrared radiation emitted from the planet's surface.
5) materials or substances occurring in nature which can be exploited for economic gain.
"the sustainable use of natural resources"
Explanation:
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