Question

Q.1 What is pasteurization. How is it helpful to preserve food.?
Q.2 What are microorganisms. How are they useful for us?
Q.3 What are traditional techniques of irrigation?
Q.4 Write down the different steps of sowing seeds.
Q.5 Why do you mean by food poisoning? Name the microorganisms which cause food poisoning.
Q.6 Why is irrigation necessary for crops? ​

Answer 1

Answer:

Q1. Pasteurization is the process of heating milk for 15 to 30 minutes at temperature of 70 degree Celsius and then suddenly cooling it and chill it.

It is also help to preserve food as heating at High temperature kills bacteria and suddenly chilling it also.

Q2. Microorganisms are the organisms which are too small to be seen by unaided eyes . Microorganisms like yeast are used to make alcohol.

Q3. Traditional techniques of irrigation are -

Chain pump, rahat,dhekli,moat etc

Q4. Different steps of agriculture are -

1.preparing soil by ploughing and tilling.

2. Sowing healthy seeds

3. Irrigating field

4. Adding manure and fertilisers

5. Harvesting

6.storage

Q5. Food poisoning is the spoiling of food by bacterias and microorganisms like pathogens .pathogens like housefly and dragonfly are the microorganisms carrying out it.

Q6. Irrigation is necessary for crops as they need water to grow and for nutrients and minerals.

Explanation: