ICSE Class VIII Science Solutions

Displaying 5 out of 12 questions & answers.
Q1.

Choose and write the correct answer (MCQ) :

  1. Jersey is a breed of __________ :
    1. horses
    2. cows
    3. buffaloes
    4. goats
  2. _____________ is a kharif crop.
    1. mustard
    2. gram
    3. wheat
    4. bajra
  3. Animal husbandry deals with __________ :
    1. poultry
    2. fisheries
    3. apiculture
    4. all domestic animals
  4. The crops that are harvested by March and April are __________ :
    1. rabi crops 
    2. medicinal crops
    3. kharif crops
    4. fibre crops
  5. Large scale watering of plants is called ___________ :
    1. winnowing 
    2. transportation 
    3. irrigation 
    4. germination 
  6. Separating the gains from chaff is called ___________ :
    1. threshing 
    2. harvesting
    3. hybridization
    4. winnowing
  7. Among animal foods,the richest source of proteins are ____________ :
    1. chickens
    2. milk
    3. eggs
    4. fish
  8. Ploughing, levelling and manuring are the steps of ___________ :
    1. preparation of soil
    2. irrigation
    3. sowing
    4. weeding
S A M P L E
S A M P L E
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Answer:
S A M P L E
  1. (b) cows
  2. (d) bajra
  3. (d) all domestic animals
  4. (a) rabi crops
  5. (c) irrigation
  6. (d) winnowing
  7. (c) eggs
  8. (a) preparation of soil
Q2.

Fill in the blanks 

  1. Cross- breeding of plants to produce new varieties is called ____________ .
  2. The ___________ and ___________ disease is caused by a virus in cattle.
  3. The rainy season crops are called ___________ .
  4. Maize is a ___________ crop.
  5. Hybridization involves ____________ breeding of different varieties of crops.
  6. ___________ is the elimination of undesirable plant from a field.
  7. ___________ is the process of sowing of seeds by hand or by using a seed drill.
S A M P L E
S A M P L E
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Answer:
S A M P L E
  1. crossing
  2. food, mouth
  3. kharif
  4. kharif
  5. cross
  6. Weeding
  7. Broadcasting
Q3.

Match the column A with column B :

AB
1. Harrowa. killing undersirable plants
2. Sowingb. weeding
3. Sicklec. digging and turning the soil
4. Weedingd. harvesting 
5. Ploughinge. seed drill

 

S A M P L E
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Answer:
S A M P L E
  1. (b) weeding
  2. (e) seed drill
  3. (d) harvesting
  4. (a) killing undesirable plants
  5. (c) digging and turning the soil
Q4.
Name the tool used for sowing seeds.
S A M P L E
S A M P L E
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Answer:
S A M P L E

The tool used for sowing seeds is seed drill.

Q5.
Difine hybridization.
S A M P L E
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Answer:
S A M P L E

The process of developing hybrids is known as hybridization or crossing. A cross between the best resistant and a high yielding variety produce a new plant is called hybrid.

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