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Class 8_Ch.1 and 2

Total questions: 93

Worksheet time: 47mins

Name
Class
Date
1.
Fungi is benefical to us because of the following reason:
a)
They are a source of oxygen
b)
They can clean up pollution
c)
They are a source of antibiotics
d)
They help to clean run off from waste
2.
Which of the following is an example of a harmful microorganism?
a)
Fungi used as antibiotics
b)
Ecoli on food that makes people sick
c)
Bacteria found in yogurt.
d)
Microorganisms helping dead matter to decay
3.
What is true about bacteria?
a)
Bacteria use photosynthesis to make their own food
b)
Bacteria can only be found in dirt
c)
Bacteria is always beneficial
d)
Bacteria can be used to make certain foods
4.
Which of the following statements are true?
a)
All microorganisms are bad
b)
All microorganisms are good
c)
Some microorganisms are harmful, while some can be helpful
d)
Microorganisms are too small to do anything to anyone
5.
Which is not an example of a helpful microorganism?
a)
Yeast to help bread rise
b)
A virus used in a vaccine
c)
Microbes used to clean oil spills
d)
Bacteria that causes strep throat
6.
Which is not an example of a helpful microorganism?
a)
Yeast to help bread rise
b)
A virus used in a vaccine
c)
Microbes used to clean oil spills
d)
Bacteria that causes strep throat
7.

Organisms that cannot be seen with unaided eyes are?

a)

Micrones

b)

Microbials

c)

Microorganisms

d)

Microbiology

8.

The type of corona virus that is currently causing pandemic worldwide is

a)

SARS

b)

MERS

c)

COVID-12

d)

COVID-19

9.

Diseases dysentery and malaria are caused by

a)

Bacteria

b)

Protozoa

c)

Fungi

d)

Virus

10.

The bacterium that promotes formation of curd from milk is

a)

Streptococcus

b)

Lactobacillus

c)

Micrococcus

d)

Psuedomonas

11.

The disease causing microbes are known as

a)

Pathology

b)

Pathogenesis

c)

Pathogens

d)

Antibodies

12.

Rhizobium bacteria

a)

Helps in digestion

b)

Helps in Nitrogen fixation

c)

Causes disease

d)

All of the above

13.

Hepatitis A is caused by

a)

Bacteria

b)

Protozoa

c)

Fungi

d)

Virus

14.

Rust of wheat is caused by

a)

Fungi

b)

Bacteria

c)

Virus

d)

Algae

15.

Preservatives used in pickles is

a)

Sodium benzoate

b)

Heat and cold treatment

c)

Sugar

d)

Oil and Vinegar

16.

Influenza is a disease caused due to

a)

Bacteria

b)

virus

c)

Protozoa

d)

None of the above

17.

------------------------------- was the person known to have observed bacteria under a magnifying glass.

(a)  

18.

A fungus that grows on stale bread is:

a)

Penicillium

b)

Aspergillus

c)

Rhizopus

d)

None

19.

An example of symbiotic relationship is found in:

a)

Moulds

b)

Bacteriophase

c)

Aspergillus

d)

Lichens

20.
A tiny, nonliving particle that invades and then reproduces inside a living cell.
a)
Bacteria
b)
Virus
c)
Protist
d)
Fungi
21.
A preparation of weakened or killed pathogens.
a)
Bacteria
b)
Antibiotic Resistance
c)
Vaccine
d)
Capsid
22.
Viruses are considered living organisms. 
a)
True
b)
False
23.

Bacteria is known as__________________ in an ecosystem when feeding on dead organisms.

a)

Decomposers

b)

Herbivore

c)

Pathogens

d)

Infections

24.

The Fermentation process is discovered by

a)

Louis Pasture

b)

Alexander flaming

c)

Edward jenner

d)

John Mendal

25.

Mushroom belongs to

a)

Algae

b)

Virus

c)

Fungi

d)

None of the above

26.

Penicillium is a

a)

Algae

b)

Fungus

c)

Bacteria

d)

Yeast

27.

Malaria is caused bby

a)

Protozoa

b)

Virus

c)

Algae

d)

Bacteria

28.

Amoeba belongs to

a)

Algae

b)

Fungi

c)

Virus

d)

Protozoa

29.
Yogurt contains harmful bacteria.
a)
True
b)
False
30.

Yeast is used for making bread. Yeast is a

a)

plant.

b)

spice.

c)

fungi.

d)

bacteria.

31.

What type of disease can you get from a virus?

a)

cavities

b)

chicken pox

c)

food poisoning

d)

athlete's foot

32.

Which statement is NOT true?

a)

Microorganisms help dead things decay.

b)

Microorganisms only live in soil.

c)

Microorganisms cause disease.

d)

Microorganisms are used to make cheese.

33.
A tiny, nonliving particle that invades and then reproduces inside a living cell.
a)
Bacteria
b)
Virus
c)
Protist
d)
Fungi
34.
Fungi can cause skin diseases and kill crops.
a)
True
b)
False
35.

Microbiology is the study of ______

a)

Environment

b)

Cells

c)

Microbes

d)

Plants

36.

Microorganisms are never found in a

a)

hot water spring.

b)

ice cold water.

c)

marine water.

d)

none of these.

37.

Which is not classified as a major group of the microorganisms?

a)

Bacteria

b)

Plants

c)

Virus

d)

Fungi

38.

Decomposers are those microorganisms that

a)

Synthesize food by photosynthesis.

b)

Break down the dead and decaying organic matter.

c)

Cause weathering of rock.

d)

Convert milk into curd.

39.

_____ are non-cellular infectious particles.

a)

Bacteria

b)

Blue green algae

c)

Viruses

d)

Protozoa

40.

Microorganisms can be seen with the help of a

a)

Kaleidoscope

b)

Telescope

c)

Microscope

d)

Periscope

41.

Viruses show characteristics of:

a)

Both living & non-living

b)

Living

c)

Prokaryotes

d)

Non-living

42.

Microorganisms cannot be seen by naked eye because

a)

they are colonial.

b)

they are tiny in size.

c)

they are ubiquitous in nature.

d)

they are unicellular.

43.

Which one of the following is called pond silk? ( named for beautiful pattern )

a)

Spirogyra

b)

Volvox

c)

Chlamydomonas

d)

Euglena

44.

IDENTIFY THE AGRICULTURAL TOOL

a)

SPADE

b)

KHURPI

c)

PLOUGH

d)

SICKLE

45.

WHICH OF THE FOLLOWING CROP GROWS IN WINTER?

a)

PEA

b)

PADDY

c)

MAIZE

d)

SOYABEAN

46.

WHICH AGRICULTURAL PRACTICE HELPS IN TURNING AND LOOSENING OF SOIL?

a)

SELECTION AND SHOWING OF SEEDS

b)

IRRIGATION

c)

WEEDING AND CROP ROTATION

d)

SOIL PREPARATION

47.

OUT OF FERTILIZER AND MANURE WHICH ONE IS EASILY ABSORBED BY THE ROOTS ?

a)

FERTILIZER

b)

MANURE

c)

BOTH MANURE AND FERTILIZER

d)

NONE OF THESE

48.

WHEN YOU WILL PUT SEEDS IN WATER ,WHAT IS TRUE ABOUT DAMAGED SEEDS?

a)

THEY WILL SINK

b)

THEY WILL FLOAT

c)

THEY ARE HEAVIER

d)

ALL OF THESE

49.

WHICH OF THE FOLLOWING IS NOT A FERTILIZER?

a)

UREA

b)

NPK

c)

POTASH

d)

RHIZOBIUM

50.
Can manure be used as fertilizer?
a)
No
b)
Yes
51.
In order to obtain a higher yield, farmers must undertake various agricultural practices. Which is the first step in this process?
a)
Addition of manure
b)
Preparation of soil
c)
Harvesting
d)
Irrigation 
52.

The plant roots contain nitrogen fixing bacteria _________________.

a)

Orange

b)

Pea

c)

Mango

d)

Tomato

53.

Which of the following is rich in organic nutrients?

a)

Potash

b)

Ammonium Sulphate

c)

Urea

d)

Compost

54.

VERMICOMPOST IS A

a)

FERTILISER

b)

PESTICIDE

c)

MANURE

d)

NONE OF THESE

55.

WHICH OF THE FOLLOWING IS A CEREAL CROP?

a)

PADDY

b)

MAIZE

c)

BARLEY

d)

ALL OF THESE

56.

Manures are

a)

Organic in nature

b)

Inorganic in nature

c)

Organic as well as inorganic in nature

d)

None of above

57.

Cereals generally provide

a)

Proteins

b)

Sugars

c)

Fats

d)

Vitamins.

58.

_________________ does not include Agricultural practices.

a)

Irrigation

b)

Marketing

c)

Harvesting

d)

Multiple cropping

59.
What does NPK stand for?
a)
Nutrients, Pancakes, Kittens
b)
Nitrogen, Phosphorus, Potassium
c)
Nitrogen, Potassium, Phosphorus
60.
Which of the following statements about the tilling of soil is incorrect?
a)
 It helps in aerating the soil.
b)
 It helps in increasing the fertility of the soil.
c)
It helps in increasing the water content of the soil.
d)
 It helps in the growth of helpful microbes in the soil.
61.

Which chemical controls pests

a)

Fertiliser

b)

Pesticide

c)

Herbicide

d)

Fungicide

62.

The process of loosening the husk from the grain is called________

a)

Winnowing

b)

Harvesting

c)

Threashing

d)

Weeding

63.

The process of rearing silkworms on a large scale is called______________

a)

Vermiculture

b)

Pisciculture

c)

Sericulture

d)

Apiculture

64.

Rabi Crops are grown in _______ season

a)

Summer

b)

Spring

c)

Winter

d)

rainy

65.

The process of loosening and turning the soil is called

a)

Broadcasting

b)

Irrigation

c)

Ploughing

d)

Levelling

66.

What are the advantages of preparing the soil?

a)

Allows roots to penetrate the soil easily

b)

Makes the top soil nutrient rich

c)

Makes decomposition by microbes easier

d)

All of these

67.

Arrange the following agricultural practices in the order in which they are followed.


A. Storage

B. Harvesting

C. Irrigation

D.Sowing

E. Preparation of soil

a)

A-B-C-D-E

b)

E-D-C-B-A

68.

The organic substance obtained from dead plants and animal wastes is

a)

Manure

b)

Fertilizer

c)

Irrigation

d)

Agriculture

69.

Weeds are the:

a)

unwanted plants growing along the crop

b)

insects and pests

c)

main crop plants

d)

chemical substances

70.

Weeds can be removed by using.

a)

Pesticides

b)

Fungicides

c)

Weedicides

d)

Bactericides

71.

Process of separation of grains from chaff is called:

a)

combining

b)

Winnowing

c)

fallow

d)

harvesting

72.

Which agricultural season in India begins in June/July and ends in October/November?

a)

Kharif

b)

Rabi

c)

None of these

73.

Which is the chief and most popular beverage in India?

a)

Coffee

b)

Tea

c)

Cocoa

74.

WHILE SOWING OF SEEDS PROPER DISTANCE MUST BE MAINTAINED BETWEEN EVERY SEED .WHY?

a)

TO PREVENT FROM OVERCROWDING

b)

TO PREVENT FROM COMPETITION FOR NUTRIENTS,WATER, SHELTER, SUNLIGHT ETC.

c)

TO PROTECT FROM DISEASE

d)

TO PROTECT FROM WEEDS

75.

Which of these is not a cereal?

a)

Maize

b)

Gram

c)

Wheat

d)

Rice

76.

Which of these is not a kharif crop?

a)

Wheat

b)

Rice

c)

Maize

d)

Groundnut

77.

Which of the following is not grown by transplantation:-

a)

Chillies

b)

Tomatoes

c)

Peas

d)

Paddy

78.

Which of the following is not a Rabi crop?

a)

Soyabean

b)

Peas

c)

Wheat

d)

Linseed

79.

The food obtained from animals is rich in :

a)

Fats

b)

Carbohydrates

c)

Minerals

d)

Proteins

80.

In agriculture , broadcasting is used for:-

a)

Ploughing

b)

Crop rotation

c)

Removal of weeds

d)

Sowing of seeds

81.

The rhizobium bacteria presents in root nodules of pea plants can fix one of the following from the Atmosphere. This one is:

a)

Hydrogen

b)

Oxygen

c)

Nitrogen

d)

Halogen

82.

What converts nitrogen gas into a usable form for plants and animals?

a)

bacteria

b)

rain

c)

fungi

d)

car exhaust

83.

The process in which nitrogen circulates and is recycled is called

a)

The nitrogen cycle

b)

The carbon cycle

c)

The water cycle

d)

The phosphorus cycle

84.

How is nitrogen "fixed" into a usable form for plants?

a)

Through action of bacteria only

b)

Through lightning only

c)

Through action of bacteria and lightning

d)

Through photosynthesis

85.

How do animals get the nitrogen they need?

a)

From the air they breathe

b)

From the water they drink

c)

From the food they eat

d)

From the sun

86.

What is the process of combining nitrogen gas with other elements to make nitrogen into usable compounds?

a)

nitrogen composition

b)

nitrogen fixation

c)

ammonia

d)

denitrification

87.

What process occurs when dead plant and animal matter decomposes and nitrogen is released back into the atmosphere?

a)

Assimilation

b)

Fixation

c)

Ammonification

d)

Denitrification

88.

According to this diagram, plants use nitrogen to make _________________________

a)

bacteria

b)

animals

c)

proteins

d)

decomposers

89.

According to this diagram, plants absorb

a)

nitrates

b)

nitrogen fixing bacteria

c)

animals

d)

decomposers

90.

The process that allows organisms to use nitrogen

a)

assimilation

b)

denitrification

c)

fixation

d)

ammonification

91.

Bacteria create a form of nitrogen that animals can use directly.

a)

True

b)

False

92.

What do free living bacteria in the soil do?

a)

Make clouds

b)

Turn atmospheric nitrogen into nitrates

c)

Make carbon dioxide for plants to go through photosynthesis

d)

Help plants take in water

93.

All plants have nitrogen fixing bacteria in their roots.

a)

True

b)

False

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