Exercise class 7 science 5.Food safety । Question answer class 7 science। exercise food safety।std 7

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• स्वाध्याय सातवी मराठी
   • Digital Swadhyay 7th Marathi  

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Complete the following statements by
using the correct option from those
given below.
(Irradiation, dehydration, pasteurization,
natural, chemical)
(a) Drying the food grains from farms
under the hot sun is called .......... .
(b) Materials like milk are instantly
cooled after heating up to a certain
high temperature. This method of
food preservation is called ............ .
(c) Salt is a .................. type of food
preservative.
(d) Vinegar is a .................. type of
food preservative.
Answer the following questions in
your own words.
(a) How is milk pasteurized?
(b) Why should we not consume
adulterated food materials ?
(c) What precautions do your parents
take to keep foodstuffs safe ?
(d) How does food spoilage occur ?
Which are the various factors
spoiling the food?
(e) Which methods of food preservation
would you use ?
What shall we do?
(a) There are vendors selling uncovered
sweetmeats in open places in the
market.
(b) A ‘pani-puriwalla’ is serving the
pani puri with dirty hands.
(c) We have purchased a large quantity
of fruits and vegetables.
(d) We need to protect foodstuffs from
pests like rats, cockroaches, wall-
-lizards, etc.
4. Find the odd-man-out.
(a) salt, vinegar, citric acid, sodium
benzoate
(b) lakhi dal, brick dust, metanyl yellow,
turmeric powder
(c) banana, apple, guava, almond
(d) storing, freezing, settling, drying
5. Complete the chart below.
S.No.
Foodstuff
Adulterant
1.
-----
Metanyl yellow
2.
Black pepper -----
3.
-----
Iron filings
4.
Honey
-----
t t t
6. Explain why this happens and suggest
possible remedies.
(a) Qualitative wastage of food.
(b) The cooked rice is underdone.
(c) The wheat that was bought is a bit
moist.
(d) The taste of yoghurt is too sour/slightly
bitter.
(e) Cut fruits have turned black.
7. Give reasons.
1. Food remains safe at 5o
Celsius.
2. Nowadays, food is served buffet style
during large gatherings.
Project :
1. Go to your kitchen and take notes
about the food safety measures and
the food wastage you see there.
2. In a science exhibition demonstrate
the various methods of detecting food
adulteratio