MEDIUM
8th CBSE
IMPORTANT
Earn 100

What are fossil fuels? Why are they called non-renewable resources? What are they used for?

Important Questions on Coal and Petroleum

MEDIUM
8th CBSE
IMPORTANT
Galaxy A Course in Science Book 8>Chapter 5 - Coal and Petroleum>Put on your thinking cap>Q 8
Explain the formation of coal.
HARD
8th CBSE
IMPORTANT
Galaxy A Course in Science Book 8>Chapter 5 - Coal and Petroleum>Put on your thinking cap>Q 9

Read the clues and solve the crossword.

Question Image

Across
1 It is also called black gold.
2 Highly combustible substance mainly made up of carbon atoms.
3 Process of extraction of resources from the earth.
5 The slow process of conversion of dead organisms into coal.
6 A type of coal.
Down
1 The compounds made from petroleum.
4 A type of coal has the highest carbon content.
HARD
8th CBSE
IMPORTANT
Galaxy A Course in Science Book 8>Chapter 5 - Coal and Petroleum>Put on your thinking cap>Q 10

What does the figure refer to? Also, label the products that are obtained in the proper order.

Question Image

HARD
8th CBSE
IMPORTANT
Galaxy A Course in Science Book 8>Chapter 5 - Coal and Petroleum>Extended learning>Q 1
What is biodiesel? Which plant is used for its production? Which part of the plant is used for extracting biodiesel? What are the advantages of using biodiesel? Is it being used commercially?
HARD
8th CBSE
IMPORTANT
Galaxy A Course in Science Book 8>Chapter 5 - Coal and Petroleum>Extended learning>Q 3
What are LEDs? Why are LED lamps better than CFLs?
HARD
8th CBSE
IMPORTANT
Galaxy A Course in Science Book 8>Chapter 5 - Coal and Petroleum>HOTS>Q 1
Why are people advised to make use of solar energy in place of fossil fuels?
MEDIUM
8th CBSE
IMPORTANT
Galaxy A Course in Science Book 8>Chapter 5 - Coal and Petroleum>HOTS>Q 2
Petroleum is referred to as black gold. Justify this.
MEDIUM
8th CBSE
IMPORTANT
Galaxy A Course in Science Book 8>Chapter 5 - Coal and Petroleum>HOTS>Q 3
If LPG is an odourless gas, then how do we detect a gas leakage?