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Microorganisms Grade 8 (RKC)

Total questions: 24

Worksheet time: 4mins

Name
Class
Date
1.

Nitrogen-fixing bacteria are important because...

a)

They are decomposers

b)

They are salt lovers

c)

They provide protection for plants from diseases

d)

They make nitrogen available to plants in form they can use

2.
Are microorganisms helpful or harmful?
a)
Helpful
b)
Harmful
c)
Both
d)
Neither
3.

You can find bacteria all over the world.

a)

True

b)

False

4.
What type of instrument would you use to look at cells?
a)
Telescope
b)
Giroscope
c)
Microscope
d)
None of the above
5.

Yeast is a type of ____________ that people use to make bread.

a)

Bacteria

b)

Fungus

c)

Virus

d)

Protist

6.

Select the disease which can be treated with antibiotics.

a)

Swine Flu

b)

Influenza

c)

COVID 19

d)

Bacterial infection

7.

How nitrogen is "fixed" into useable form for plants

a)

Only through action of bacteria

b)

Only through lightning

c)

Through action of bacteria & lightning

d)

Through photosynthesis

8.

Gas that makes up almost 78% of Earth's atmosphere

a)

Oxygen

b)

Carbon dioxide

c)

Nitrogen

d)

Hydrogen

9.

The gas released during the preparation of bread is:

(a)  

10.

Salt is used as a food preservative.

a)

True

b)

False

11.

Name the type of microorganism that is smaller than bacteria and which is a link between dead and alive.

(a)  

12.
Antibiotics can be used to treat a viral infection.
a)
True
b)
False
13.

A Bacteria responsible for curdling of milk is

a)

Rhizobium

b)

Oscillatoria

c)

Lactobacillus

d)

Plasmodium

14.

Rhizobium bacteria

a)

Help in Digestion

b)

Help in nitrogen fixation

c)

Cause diseases

d)

All the above

15.

Penicillium is a

a)

Algae

b)

Fungus

c)

Bacteria

d)

Yeast

16.
Microorganisms can be found:
a)
The the ocean, inside and outside your body
b)
On plants and animals
c)
In medicine and your food
d)
All of the above
17.
_________________ bacteria are in your _________________ to help digest food.
a)
Helpful; throat
b)
Helpful; stomach
c)
Harmful; esophagus
d)
Harmful; lungs
18.

The Fermentation process is discovered by

a)

Louis Pasture

b)

Alexander flaming

c)

Edward jenner

d)

John Mendal

19.

Influenza is a disease caused due to

a)

bacteria

b)

Virus

c)

Protozoa

d)

None of the above

20.

Malaria is caused bby

a)

Protozoa

b)

Virus

c)

Algae

d)

Bacteria

21.

Amoeba belongs to

a)

Algae

b)

Fungi

c)

Virus

d)

Protozoa

22.

What we call the study of microorganisms?

a)

Biology

b)

Microbiology

c)

Zoology

d)

Astrology

23.
A disease that can be passed from one person to another through pathogens.
a)
Communicable disease
b)
Noncommunicable disease
24.
Why is a microscope needed to view cells?
a)
to separate cells from each other 
b)
to make cells look bigger than they are
c)
to make cells look smaller than they are
d)
to hold the cells still so they can be seen

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