DAV Class 5 Science Solution Chapter 6 Spoilage and Wastage of Food and Food Preservation
DAV School Books Class 5 Science Solution Chapter 6 Spoilage and Wastage of Food and Food Preservation all Question Answer. DAV Class 5 6th Chapter Spoilage and Wastage of Food and Food Preservation full Chapter explanation by expert teacher.
A.) Fill in the blanks.
Answer: (1) fungi (2) moist, dark (3) spoilage (4) air tight (5) low.
B.) Write True or False for the following statements.
1.) Growth of bread moulds, on bread, indicates that it has got spoiled.
2.) Vinegar is used as a preservative.
3.) It is safe to drink unpastuerised milk.
4) We can eat more than the required quantity
5) We may eat spoiled food rather than wasting
Answer: (1) True (2) True (3) False, people can still drink unpasteurised milk as it still contains good bacterias (4) False, we only need to eat a certain quantity of food (5) False, it is better not to eat spoiled food as it may contain harmful bacteria
C.) Tick the correct option.
1.) A natural insect repellant, found in our kitchens, is-
Answer: turmeric powder
2.) Dry foods, like cereals and nuts, are preserved by-
Answer: vacuum packing
3.) Fruits and vegetables get ripened due to the action of-
Answer: enzymes
4.) The least perishable food item, from the following, is-
Answer: biscuits
5.) The chances of spoilage of food can be reduced by keeping the food-
Answer: at low temperatures
D.) Answer the following questions in brief.
1.) State two factors that contribute to the fast growth of micro-organisms.
Answer: Moisture and right temperature affect the growth of microorganism
2.) What is likely to happen to curd if it is not stored in the refrigerator?
Answer: If the if the curd is not stored in the refrigerator it will be spoiled .
3.) What do you understand by food, preservation?
Answer: Food preservation is a process by which Food is taken care of and treated so that microorganisms do not grow easily and do not spoil the food.
4.) How can we protect our food from insects, worms and rats?
Answer: In order to protect our food from insect worms and rats we need to store it in a place that is airtight such that these animals cannot reach it.
5.) Why does food stay fresh for a longer time when stored in a refrigerator?
In the fridge the temperature is very low and does not help the microorganism grow in such a low temperature as a result food states relatively fresh.
E.) Answers the following questions.
1.) Give any three reasons for spoilage of food.
Food can get spoiled due to the action of microorganisms such as fungus and bacteria
Also food can get spoiled due to the action of enzymes otherwise enzymes are supposed to help fruits and vegetable ripen
Worms and rat at times try to reach the food well it is moist and kept in dark therefore it is essential to take care to keep the food at a better place.
2.) How is food preservation useful to us?
A food that is well preserved usually contains all the important nutritions and minerals
The shelf life of the food increases as a result the full worth of the food can be obtained
By the methods of food preservation even seasonal foods or foods that are rarely found can also be preserved
Also this decreases wastage of food.
3.) Why is it important to check the manufacturing and the expiry date of packaged food items before consuming them?
The manufacturing and expiry date of a package food item denotes how long the item is consumable. if the manufacturing date is of long ago or the expiry date has been exceeded such poor food should be avoided because it is obvious that the food must have been spoiled by then.
4) Explain the following methods of food preservation:
(a) Dehydration
(b) Canning and Bottling
(c) Pasteurisation
Dehydration is the process of food preservation in which the water or moisture content is removed from the food item.
This is the process of food preservation in which foods are stored and sealed tightly in airtight containers or sterile jars or cans. The bottles are sthoroughly sterilized.
It is the process in which different food products especially milk are continuously heated under a certain pressure for a period of time and then it is allowed to cool immediately. By this process many harmful bacterias are killed
5.) Rakesh bought two raw papayas. He kept one papaya in the refrigerator and other papaya on the kitchen shelf. Which will ripen first and why?
The papaya left on the kitchen shelf will ripen faster due to the effect of temperature and moisture.