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प्रश्न
What are the different purposes for which fuels such as petrol, diesel, kerosene, natural gas, coal, and wood are used?
उत्तर
Petrol and diesel are used as fuel in vehicles used for transport. Two wheelers. cars, trucks, and aeroplanes run on these fuels. Kerosene. cooking gas (LPG) and wood are used as fuels for cooking and other domestic uses. Coal is used for electricity generation and also in industrial processes. Diesel is also used to run engines and machines in factories.
संबंधित प्रश्न
Which one term in the following includes the others?
air, flora, fauna, environment, water, sunlight, soil
The number of malaria patients in a village increased tremendously when large number of frogs were exported from the village. What could be the cause for it?
What is meant by 'environment'?
The use of one of the following will pollute the environment. This one is :
(a) paper carry bags
(b) cotton cloth carry bags
(c) nylon cloth carry bags
(d) jute carry bags
Could you observe any microorganisms?
Which one of the places you visited shows greater biodiversity?
Classify the following as natural or man-made.
Soil.
Classify the following as natural or man-made.
stone.
Classify the following as natural or man-made.
water hyacinth.
Classify the following as natural or man-made.
cottonwool
Classify the following as natural or man-made.
book.
_______ is the process of converting waste materials into new materials.
Take a square paper. Fold its diagonals. Draw three lines in three triangles as shown in the picture.
Cut from the edge of the diagonal to the center as shown in the picture.
If you fold this triangle and paste it behind the third triangle you get a pyramidal shape.
In one of the triangles, draw images of each of the organisms in the different levels.
In another triangle write the names of the organisms. In the last triangle, write the energy level of the organism. Have a look at the following example. You must come up with different organisms!.
Excessive exposure of humans to UV-rays results in
- damage to immune system
- damage to lungs
- skin cancer
- peptic ulcers
Select the mis-matched pair in the following and correct it.
Explain some harmful effects of agricultural practices on the environment.
The abiotic factors are the non-living parts such as sunlight, air, water, and minerals in the soil.
