Sub EVS Topic Food and its preservation (workbook work)
Workbook |
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1.
Write whether the following statements are
true or false. |
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a.
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The act of chewing stimulates the salivary
glands to release saliva. True |
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b.
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Pasteurisation
involves heating milk at a very low temperature. False |
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c.
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Lemon is an example of a natural
preservative. True |
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d.
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Improper storage of food leads to food
spoilage. True |
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2.
Define the following |
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a.
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Microorganisms |
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ans: |
Microorganisms are living things that are too
small to be seen with the naked eye. |
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b.
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Health |
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ans: |
Health is
the state of complete physical and mental well-being and not merely the
absence of diseases. |
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c.
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Digestion |
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ans: |
The
process by which food is broken down into simpler forms that can be absorbed
by the body is known as digestion. |
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d.
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Preservative |
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ans: |
Preservatives
are chemical substances that are used to increase the shelf-life and prohibit
the spoilage of different food items. |
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3.
Answer the following questions in 2-3
sentences. |
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a.
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State the
importance of teeth in the process of digestion. |
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ans: |
Teeth plays an important role in the process of digestion since they
help in biting and chewing the food. |
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b.
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Name
two methods that can be used to preserve milk. |
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ans: |
Pasteurization and boiling |
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c.
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Why
does food stay fresh for a longer time when stored in a refrigerator? |
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ans: |
Microorganisms
like bacteria and fungi cannot survive at extremely low temperatures.Thus, food stays fresh for a longer time when
stored in a refrigerator. |
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d.
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Oil
is used in pickles. Give reason why. |
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ans: |
Use
of oil in pickles prevents food from coming into contact with microorganisms
in the air. Thus, the growth of microorganisms is prevented. |
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4.
Picture study |
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The given images show a method of food
preservation. |
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a.
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Identify the method and describe the technique used. |
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ans: |
Pickling |
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b.
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Give two other examples of food items that can be preserved by this
method. |
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ans: |
pickles/ marmalades/ jellies. |
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5.
Fun Time |
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Unscramble the letters to find the words. |
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a. |
SERPREVATIVE:PRESERVATIVE |
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b. |
ORSAVY: SAVOURY |
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c. |
OILBING: BOILING |
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d. |
GEEFRZIN: FREEZING |
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6.
Challenge time |
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Digestion of food begins in the mouth. The
act of chewing stimulates gland X to secret substance Y that helps to moisten
the food. It also forms a bolus, which can be swallowed easily. Identify X and Y.
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