Mcqs unit 4 grade 5 science

Mcqs unit 4 grade 5 science

1)a few thousand years ago ,human population was small, people obtained their food by gathering a)fruits    b)vegetables   c)roots of different plants  4) all of these

Ans) all of these

2) any change in the environment which may be harmful to living things is known as

Ans)  environmental pollution

3) which natural changes may  also be the cause of pollution? a) floods   b) earth quakes c)volcanoes d) all

Ans) all

4)How many trees are cut to make paper for Sunday newspapers in America?

Ans)500,000.

5)The place where an organism or a population normally occurs or lives is called:

Ans)habitat.

6)The weather condition in an area is called:

Ans)climate

7)All the orginsms of the same type that live in the same area at a particular time is called:

Ans)population.

8)Industries, transportation and agriculture are using more and more fuel and releases in the invironment:

Ans)harmful gases.

10)How many parts does our environment have?

Ans)three.

11)What kind of pollution are there? a)air pollution b)water pollution c)land pollution d)all of these.

Ans)all of these.

12)We need fresh air rich in

Ans)oxygen

13)Which gas is produced in the air,by burning fuel in the industries?

Ans)Carbon dioxide

14)The smoke present in the air causes

Ans)

15)The disease caused by smoke in air are of. a)lungs b)skin c)eyes d)all of these

Ans)all of these.

16)Due to air pollution, our earth is hotter day by day it is called

Ans)global warming

17)what things are mixed with water when water canals pass through the agriculture areas? a)fertilizers  b)pesticides c)garbage d)both a and b

Ans)both a and b

18)What diseases are caused by bacteria? a)cholera b)typhoid c)diarrhea d)all of these

Ans)all of these

19)Due to which gases sewage water produces bad smell?

Ans)ammonia and hydrogen sulphide

20)In Asia how many people die every year after consuming polluted water?

Ans)5 to 10 million

21)Which type of pollution is produced when we dump home and factory wastes in soil?

Ans)land pollution

22)Garbage from houses,offices is thrown into streets or at open places,these open places,become good homes for:a)rats b)flies c)worms

Ans)All of these

23)The energy saved by recycling one aluminium can is enough to operate to set for:

Ans)3 hours

24)Pollution in our environment is making it  unfavourable for:a)humans b)other animals c)plants

Ans)All of these

25)Our natural resources are:a)water b)fuel c)air

Ans)All of these

26)The major cause of pollution is:

Ans)burning of fuel

27)Which of the following measures are involved to reduce pollution?a)forests should not be cut down b)burning of fuel c)careful use of natural resources with care

Ans)both a&b

28)When some materials rots,it actually decomposed by:a)bacteria b)fungi c)protozoa

Ans)both a&b

29)In the process of decomposition,the material breaks into simpler compounds called

Ans)Biodegradable

30)The materials which cannot be broken down into simpler compounds by microorganisms are called:

Ans)non-biodegradable

31)All are the examples of biodegradable materials except
Ans)cement

32)The chemicals used in insect-killer sprays are

  Ans)non-biodegradable

33)The major cause of land pollution  is

Ans)plastic bag

34)Plastic wastes are thrown in the ocean where they are responsible for

Ans)death of fish and other animals

35)when non-biodegradable materials are stored

Ans)a roots

36)Time taken by banana peel to convert into biodegradable material is

Ans)two month

37)Which of the caused pollution? A)burning fuel in vehicles and industry b)mixing of untreated sewage in underground water and rivers c)over-use of non-biodegradable materials d)all the these

Ans)all of these.

38)Which of the main reason of acid rain?

Ans)air pollution

39)Which is non-biodegradable?

Ans)glass

40)A disease caused by polluted water is

Ans)cholera                                                                                                      

41)What is the proper way to  dispose of used tyres?

Ans)recycle them to make new rubber

42)Which is way to reduce pollution? a)drive less and walk more b)recycle the non-biodegradable material c)treat sewage before releasing it into river d)all the these

Ans)all of these

 43)The pollution cause by volcano is called

Ans)Air pollution

44)Which method is used to minimize the effect of environmental pollution?

Ans)Growing of plant

45)A group of non-biodegradable is

Ans)rubber,glass

46)Cause of land pollution is

Ans)Excessive use of plastic bags and insectids

47)Identify the group of biodegradable materials

Ans)animals waste,paper

48)Which one is non-biodegradable thing

Ans)plastic tyre

49)Which cause of air pollution cannot be controlled man

Ans)smoke coming out from volcano

50)Sewage water produced bad smell due to presence of a gas called

Ans)hydrogen sulphide

51)Identify the matter which cause air pollution

Ans)coal

52)The addition of harmful and unwanted materials in the environment are called

Ans) pollution

53)Environmental pollution is any change in the environment

Ans)which may be harmful to living things

54)It is the place where an organisms or population normally lives or occurs

Ans)habitat

55)The weather condition in an area  in general is called

Ans)climate

56)All the organisms of the same area that live in the same area at a particular time is called

Ans)population

57)When wastes from industries and homes are mixed in soil ,this type of pollution is called

Ans)land pollution

58)When fuel is burn in industries then in the air

Ans)carbon dioxide is produced

59)Smoke in air causes

Ans)acid rain

60)Non-biodegradable are such material which

Ans) cannot be broken down into simpler compound by microorganisms

61)All are the examples of biodegradables EXCEPT

Ans)plastic shopping bags

62)If the air is polluted the

Ans)the life of every living thing will be in danger

63)Rice seedws are sown in

Ans)rainy season

64)The air present among soil particles provides

Ans)oxygen

65)From the following ONE option is the cause of environment pollution

Ans)poisonous smoke, dirty water,garbage and pesticides

66)The main cause of cholera and typhoid is

Ans)denseness present in sewage water

67)To minimize pollution,factories should make

Ans)away from the cities