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Match items in column A with those in column B

  A   B
1 Kharif crops a Food for cattle
2 Rabi crops b Urea and super phosphate
3 Chemical fertilisers c Animal excreta, cow dung
urine and plant waste
4 Organic manure d Wheat, gram, pea
    e Paddy and maize

 

[1] Crop Production and Management
Chapter: [1] Crop Production and Management
Concept: Agricultural Practices

Give two examples of Kharif crop

[1] Crop Production and Management
Chapter: [1] Crop Production and Management
Concept: Agricultural Practices

Give two examples of Rabi crop.

[1] Crop Production and Management
Chapter: [1] Crop Production and Management
Concept: Agricultural Practices

If wheat is sown in the kharif season, what would happen? Discuss.

[1] Crop Production and Management
Chapter: [1] Crop Production and Management
Concept: Agricultural Practices

Arrange the following boxes in proper order to make a flow chart of sugarcane crop production.

[1] Crop Production and Management
Chapter: [1] Crop Production and Management
Concept: Agricultural Practices

Complete the following word puzzle with the help of clues given below.

Down

1) Providing water to the crops.

2) Keeping crop grains for a long time under proper conditions.

5) Certain plants of the same kind grown on a large scale.

Across

3) A machine used for cutting the matured crop.

4) A rabi crop that is also one of the pulses.

6) A process of separating the grain from chaff.

[1] Crop Production and Management
Chapter: [1] Crop Production and Management
Concept: Agricultural Practices

Fill in the blanks:

Microorganisms can be seen with the help of a _________

[2] Microorganisms: Friend and Foe
Chapter: [2] Microorganisms: Friend and Foe
Concept: Concept of Microorganisms

Tick the correct answer:

Carrier of malaria-causing protozoan is

(1) female Anopheles mosquito

(2) cockroach

(3) housefly

(4) butterfly

[2] Microorganisms: Friend and Foe
Chapter: [2] Microorganisms: Friend and Foe
Concept: Concept of Microorganisms

Tick the correct answer:

The most common carrier of communicable diseases is

(1) ant

(2) housefly

(3) dragonfly

(4) spider

[2] Microorganisms: Friend and Foe
Chapter: [2] Microorganisms: Friend and Foe
Concept: Concept of Microorganisms

Match the organisms in Column I with their action in Column II.

  Column I   Column II
1 Bacteria a Fixing Nitrogen
2 Rhizobium b Setting of curd
3 Lactobacillus c Baking of bread
4 Yeast d Causing Malaria
5 A protozoan e Causing Cholera
6 A Virus f Causing AIDS
    g Producing antibodies
[2] Microorganisms: Friend and Foe
Chapter: [2] Microorganisms: Friend and Foe
Concept: Concept of Microorganisms

Can microorganisms be seen with the naked eye? If not, how can they be seen?

[2] Microorganisms: Friend and Foe
Chapter: [2] Microorganisms: Friend and Foe
Concept: Concept of Microorganisms

What are the major groups of microorganisms?

[2] Microorganisms: Friend and Foe
Chapter: [2] Microorganisms: Friend and Foe
Concept: Concept of Microorganisms

Explain why some fibres are called synthetic.

[3] Synthetic Fibres and Plastics
Chapter: [3] Synthetic Fibres and Plastics
Concept: Concept of Synthetic Fibres

Fill in the blanks with appropriate words.

Synthetic fibres are also called ______ or _______ fibres.

[3] Synthetic Fibres and Plastics
Chapter: [3] Synthetic Fibres and Plastics
Concept: Concept of Synthetic Fibres

Fill in the blanks with appropriate words.

Synthetic fibres are synthesised from raw materials called ______

[3] Synthetic Fibres and Plastics
Chapter: [3] Synthetic Fibres and Plastics
Concept: Concept of Synthetic Fibres

Rana wants to buy shirts for summer. Should he buy cotton shirts or shirts made from synthetic material? Advise Rana, giving your reason.

[3] Synthetic Fibres and Plastics
Chapter: [3] Synthetic Fibres and Plastics
Concept: Concept of Synthetic Fibres

Match the terms of column A correctly with the phrases given in column B.

  A   B
1 Polyester a Prepared by using wood pulp
2 Teflon b Used for making parachutes and stockings
3 Rayon c Used to make non-stick cookware
4 Nylon d Fabrics do not wrinkle easily
[3] Synthetic Fibres and Plastics
Chapter: [3] Synthetic Fibres and Plastics
Concept: Concept of Synthetic Fibres

‘Manufacturing synthetic fibres is actually helping conservation of forests’. Comment.

[3] Synthetic Fibres and Plastics
Chapter: [3] Synthetic Fibres and Plastics
Concept: Concept of Synthetic Fibres

Which of the following can be beaten into thin sheets?

(a) Zinc

(b) Phosphorus

(c) Sulphur

(d) Oxygen

[4] Materials: Metals and Non-metals
Chapter: [4] Materials: Metals and Non-metals
Concept: Physical Properties of Metals and Non-metals

Which of the following statements is correct?

(a) All metals are ductile.

(b) All non-metals are ductile.

(c) Generally, metals are ductile.

(d) Some non-metals are ductile.

[4] Materials: Metals and Non-metals
Chapter: [4] Materials: Metals and Non-metals
Concept: Physical Properties of Metals and Non-metals
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