Question 1:
The word oil is used for whom ?
Answer:
The word oil is used for petrol, diesel and mineral oil.
Question 2:
Write a slogan for saving of oil.
Answer:
‘‘Petrol and diesel will not last forever. Save it for your children.’’
Question 3:
How oil is extracted from earth ?
Answer:
Oil is extracted from earth by making holes by the machines.
Question 4:
How much time is taken in the formation of oil ?
Answer:
It took thousands of years to form oil in the earth by the decomposition of dead organic matter.
Question 5:
What are the uses of sun rays ?
Answer:
1. Sun rays are used to dry the things.
2. It is used to heat water and to cook food.
3. It is used to produce electricity.
4. It is used to run motors in many countries.
Question 6:
What is the nature of the oil extracted from earth ? How is it refined ?
Answer:
The oil extracted from earth is a thick viscous pungent smelling liquid. It has many things dissolved in it. It is refined in oil refinery.
Question 7:
Which products are obtained while refining crude oil in refinery ?
Answer:
We get kerosene, diesel, petrol, engine oil, wax, LPG, coal tar and grease during refining of petroleum.
Question 8:
What is difference in the prices of diesel and petrol in 2007 ?
Answer:
In 2007 the prices of diesel and petrol are more.
Question 9:
Write the uses of products obtained from petroleum.
Answer:
1. Petrol and diesel are used as fuel.
2. Petrol is used for dry cleaning.
3. Kerosene oil and LPG are used as domestic fuel.
4. Many products are used for making plastic and paints.
Question 10:
What is harm in cooking food by burning wood and uple ?
Answer:
1. Wood and uple on burning produce air pollution.
2. It harms the health of the person who cooks food.
Question 11:
In villages people oftenly use which substances to cook food and warm water ?
Answer:
In villages people oftenly use uple, dry twigs and wood for cooking food and heating water.