NSO Level 1- Science Olympiad (SOF) Class 9: Questions 821 - 827 of 1128

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Question 821

Question

MCQ▾

Providing a clean environment can prevent

Choices

Choice (4)Response

a.

water-borne diseases

b.

vector-borne diseases

c.

sexually transmitted diseases

d.

air-borne diseases

Question 822

Question

MCQ▾

Intestine absorbs the digested food materials. What kind of epithelial cells are responsible for that?

Choices

Choice (4)Response

a.

Cuboidal epithelium

b.

Stratified squamous epithelial

c.

Spindle fibres

d.

Columnar epithelium

Question 823

Question

MCQ▾

A car crossed a bridge with an initial velocity of and increased the velocity to while crossing the bridge. If the car took 3 minutes to cross the bridge, the acceleration generated will be

Choices

Choice (4)Response

a.

b.

c.

d.

Question 824

Question

MCQ▾

The intermixing of particles of two substances is called

Choices

Choice (4)Response

a.

diffusion

b.

dispersion

c.

displacement

d.

sublimation

Question 825

Question

MCQ▾

SI unit of velocity is

Choices

Choice (4)Response

a.

b.

c.

d.

Question 826

Question

MCQ▾

Infectious diseases can be prevented by

Choices

Choice (4)Response

a.

Taking measures that reduce the exposure to infectious agents

b.

Immunisation

c.

Public hygiene

d.

All a., b. and c. are correct

Question 827

Question

MCQ▾

Which of these cause water pollution?

Choices

Choice (4)Response

a.

Addition of undesirable substances from water

b.

Removal of desirable substances from water

c.

Change in temperature

d.

All a., b. and c. are correct

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