sun to dash to fossil fuel to coal,LPG, dash,dash,dash.please answer fast.
Answers
Answer:
Explanation:
1. Name some inexhaustible substances other than sunlight and air.
2. Which fuel is used for running vehicles?
(a) Wood(b) Coal (c) Diesel(d) Charcoal
3. Which of the following is a natural resource?
(a) Tea(b) Cooked food (c) Air(d) Toffee
4. inexhaustible natural resource in nature are
(a) limited(b) unlimited (c) scarce(d) not present
5. Which of the following is an exhaustible natural resource?
(a) Air(b) Water (c) Soil(d) Forest
Types of natural resourcesMemory map
FuelsA fuel is a substance, which bums In air to produce energy without releasing harmful gases in large quantities.Fuels can be classified as natural (primary) fuels and derived (secondary) fuels. If a fuel Is present in its natural state, it is called natural fuel. If a fuel is processed to improve its quality, it Is called derived fuel.
Memory map
Calorific value of a fuel
Calorific value of a fuel is the amount of heat liberated by complete burning of a unit mass or volume of a fuel. For liquid or gaseous fuels, volume of fuel is considered while for solid fuels mass of fuel is considered to find out the calorific value.
Characteristics of an ideal fuel
(1) It should have a high calorific value.(2) It should not cause any pollution or should not produce harmful gases on combustion.(3) It should be of low cost and easily available.(4) It should be easy to handle, store and transport.(5) It should have moderate ignition temperature.(6) It should have moderate rate of combustion.
Fossil fuelsExhaustible natural resources like coal, petroleum and natural gas were formed from the dead remains of living organism (fossils). So, these are called fossil fuels. Coal and petroleum are very important natural resources and play a vital role in modem society. They are found in the earth's crust.
CoalCoal is a complex mixture of carbon, hydrogen and oxygen compounds. me nitrogen, sulphur and phosphorus compounds are also present in it. It is found in coal mines deep under the surface of earth. Story of formation : It is believed that millions of years ago, the ground below the forests was split open by natural forces such as earthquakes and volcanoes. The forests got buried under the surface of earth. Thus, the plants had no contact with oxygen. Successive layers of sediments sealed the buried plants. Over millions of year, these deposits were subjected to tremendous pressure and heat finally transformed them into coal.Carbonisation: The chemical process involved in the transformation of punt matter into coal is called the carbonisation of plant matter.
Answer:
Don't know dear friends
Explanation:
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