NSO Level 1- Science Olympiad (SOF) Class 8: Questions 335 - 339 of 1175

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Question 335

Question

MCQ▾

Deforestation increases the level of carbon dioxide in the atmosphere. Correct explanation to this statement is

Choices

Choice (4)Response

a.

Cutting down trees decreases the utilization of carbon dioxide.

b.

Plants utilize carbon dioxide for photosynthesis

c.

A is the explanation of b

d.

None of the above

Question 336

Question

MCQ▾

In which of the following food items, Pasteurization is used as a method of preservation?

Choices

Choice (4)Response

a.

Milk

b.

Milk products

c.

Vegetables

d.

Fruits

Question 337

Question

MCQ▾

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 338

Question

MCQ▾

The natural environment where an organism lives is called its

Choices

Choice (4)Response

a.

Home

b.

Resort

c.

Habitat

d.

Biosphere

Question 339

Question

MCQ▾

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

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