CBSE (Central Board of Secondary Education) Class-8 Science: Questions 9 - 15 of 465

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Question 9

Question MCQ▾

Weedicides is the process of

Choices

Choice (4)Response

a.

Uprooting the weeds manually

b.

Remove weeds by spraying of chemicals

c.

Removing weeds by use of harrows spades or trowels (Khurpa)

d.

Removing weeds by biological method

Edit

Question 10

Question MCQ▾

The process of removing chaff from the threshed grain is called

Choices

Choice (4)Response

a.

Weeding

b.

Threshing

c.

Winnowing

d.

Harvesting

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Question 11

Question MCQ▾

Algae that increases the soil fertility is

Choices

Choice (4)Response

a.

Kelps

b.

Real Algae

c.

Nostoc and Anabaena

d.

Diatoms

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Question 12

Question MCQ▾

Micro-organisms decompose organic waste such as

Choices

Choice (4)Response

a.

Cheese, pickles

b.

Vegetable peels, plants and animal waste

c.

Medicines

d.

Vaccines

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Question 13

Question MCQ▾

Bacteria which causes the food poisoning is:

Choices

Choice (4)Response

a.

Escherichia coli

b.

Salmonella and Staphylococcus

c.

Spirilla

d.

Peneumococcus

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Question 14

Question MCQ▾

Name the tool used for making soil soft for penetration of roots

Choices

Choice (4)Response

a.

Hoe

b.

Ploughshare

c.

wooden plank

d.

All of the above

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Question 15

Question MCQ▾

The term Protozoa means:

Choices

Choice (4)Response

a.

The most primitive and simplest animal

b.

Disease causing agents

c.

The disease causing micro-organisms

d.

Organisms which are the carriers of parasite

Edit