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Coal and Petroleum

Describe how coal is formed from dead vegetation. What is this process
called?

05/11/2024

Science

8th

Coal and Petroleum

Name the petroleum product used for surfacing of roads.

05/11/2024

Science

8th

Coal and Petroleum

What are the advantages of using CNG and LPG as fuels?

05/11/2024

Science

8th

Microorganisms: Friend and Foe

What are antibiotics? What precautions must be taken while taking
antibiotics?

05/11/2024

Science

8th

Microorganisms: Friend and Foe

Write a short paragraph on the harmful effects of microorganisms.

05/11/2024

Science

8th

Microorganisms: Friend and Foe

Write 10 lines on the usefulness of microorganisms in our lives.

05/11/2024

Science

8th

Microorganisms: Friend and Foe

Name the microorganisms which can fix atmospheric nitrogen in the soil.

05/11/2024

Science

8th

Microorganisms: Friend and Foe

What are the major groups of microorganisms?

05/11/2024

Science

8th

Microorganisms: Friend and Foe

Can microorganisms be seen with the naked eye? If not, how can they be
seen?

05/11/2024

Science

8th

Microorganisms: Friend and Foe

Match the organisms in Column A with their action in
Column B.
A B
(i) Bacteria (a) Fixing nitrogen
(ii) Rhizobium. (b) Setting of curd
(iii) Lactobacillus (c) Baking of bread
(iv) Yeast. (d) Causing malaria
(v) A protozoan. (e) Causing cholera
(vi) A virus (f) Causing AIDS
(g) Producing antibodies

05/11/2024

Science

8th