NSO Level 1- Science Olympiad (SOF) Class 8: Questions 337 - 341 of 1076

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Question number: 337

» Crop Production and Management

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MCQ▾

Question

Growing leguminous plants helps in improving the nitrogen content in soil

  1. Rhizobium present in the root nodule of leguminous plants fix atmospheric nitrogen.

  2. Nitrogen is essential for plants to grow healthy.

  3. When these nodules decay, the nitrogen is released in to the soil.

Choices

Choice (4)Response

a.

2 and 3

b.

1 and 2

c.

1,2 and 3

d.

None of the above

Question number: 338

» Conservation of Plants and Animals

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MCQ▾

Question

The natural environment where an organism lives is called its

Choices

Choice (4)Response

a.

Home

b.

Resort

c.

Habitat

d.

Biosphere

Question number: 339

» Conservation of Plants and Animals

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MCQ▾

Question

Which of the following is not a step of desertification?

Choices

Choice (4)Response

a.

When trees are cut down on a large scale, there will be no roots to bind the soil together.

b.

The hard and rocky inner layer which is not fertile would be exposed

c.

The loose top soil would get washed away by wind and rain water.

d.

None of the above

Question number: 340

» Microorganisms

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MCQ▾

Question

The acid present in vinegar is

Choices

Choice (4)Response

a.

Sulphuric acid

b.

Ascetic acid

c.

Nitric acid

d.

Hydrochloric acid

Question number: 341

» Conservation of Plants and Animals

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MCQ▾

Question

Conversion of a fertile land to desert is called

Choices

Choice (4)Response

a.

Soil erosion

b.

Deforestation

c.

Desertification

d.

Afforestation

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