Samacheer kalvi 7th Science Term 3 Unit 5 Answers

Samacheer Kalvi 7th Science Term 3 Unit 5 Book Back Questions and Answers:

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TN State Board Class 7th Science Subject Term 3 Unit 5 one mark and two mark solutions guide PDF available below.

Science – Term 3

Unit 5 – Animals In Daily Life

I. Choose the correct answers :

1. __________ is the daily essential product that is obtained from cattle.
(a) Egg
(b) Milk
(c) Both of them
(d) None of them
Answer:
(b) Milk

2. Eggs are rich in __________
(a) Protein
(b) Carbohydrate
(c) Fat
(d) Acid
Answer:
(a) Protein

3. Which parts of the goat and sheep is used for manufacturing clothes?
(a) Leg
(b) Hand
(c) Hair
(d) Head
Answer:
(c) Hair

4. The cultivation and production of silk is known as __________
(a) Horticulture
(b) Floriculture
(c) Agriculture
(d) Sericulture
Answer:
(d) Sericulture

5. Sorter’s Disease is otherwise known as __________
(a) Asthma
(b) Anthrax
(c) Typhoid
(d) Cholera
Answer:
(b) Anthrax

II. Fill in the blanks:

Proteins and __________ are rich in milk.
__________ is extracted from bee hives.
Anthrax is caused by __________
__________ is the strongest natural fiber.
Peace silk was produced in the year __________

Answer:

Calcium
Honey
Bacillus anthracis
Silk
1992

III. True or False – If False, give the correct answer :

1. Animals are the greatest gift of nature.
Answer:
True

2. Horse hair is used as bristles in small painting brushes.
Answer:
True

3. Wool is the fibre derived from the silkworm.
Answer:
(False)
Correct statement: Sill is the fibre derived from the silkworm.

4. Ahimsa silk is otherwise known as Mulberry silk.
Answer:
(False)
Correct statement: Ahimsa silk is otherwise known as peace silk.

5. Penicillin is the best medicine for curing Anthrax.
Answer:
True

IV. Match the following :

1.	Cocoons	Meat
2.	Peace silk	Poultry
3.	Broilers	Silkworm
4.	Sweet Liquid	Andhra Pradesh
5.	Goat	Honey

Answer:

1 – iii; 2 – iv; 3 – ii; 4 – v; 5 – i

V. Analogy:

1. Water: pipe: Electric current:: ______
Answer:
Wire

2. Copper: conductor : wood: : _______
Answer:
Non conductor

3. Length : metre scale : current: : _________
Answer:
Ampere

4. Milli ampere: micro ampere: 10^-3 A : : _________
Answer:
10^-6 A

VI. Very short answer:

1. Write about any two dairy products.
Answer:

Paneer
Cheese

These two are dairy products. They are Nutritive food containing protein and calcium are made from milk.

2. What are the two types of fibres that are obtained from animals?
Answer:

Wool – silk fibre is obtained from the cocoon of silkworm.
Wool is got from fleece of sheep or goat

3. What is shearing?
Answer:
The fleece of the sheep is removed from its body. This is called shearing.

4. Write the symptoms of Anthrax.
Answer:

The symptoms are fever, cough, and shortness of breath, similar to typical pneumonia.
Sometimes it may lead to nausea, vomiting, and diarrhea.

5. Define – Sericulture.
Answer:

Sericulture or silk farming is the cultivation of silk worms to produce silk.
It is the rearing of silkworms to obtain silk.

6. How should we treat animals?
Answer:

We must love and protect animals.
We should safeguard them and treat them with care.

7. Who invented the Ahimsa silk?
Answer:
Kusuma Rajaiah, a Government officer from Andhra Pradesh proposed the Ahimsa way of silk production for making silks without killing the silkworms.

VII. Short Answer Questions :

1. What are the characteristics of wool? Give any three.
Answer:

It is resistant to heat, water, wear, and tear.
It absorbs moisture.
Wool insulates against cold. So wool is a good insulator.
It does not wrinkle easily.

2. Write about any three uses of silk.
Answer:

Silk has natural beauty and elegance.
It gives comfort in warm weather and warmth during colder months.
It is used in the manufacture of classical and high fashion clothes, modern dresses particularly silk sarees, and the elegance of beautiful dresses.
It is also used in households for making wall hangings, curtains, rugs, and carpets.
It is also being used in the manufacture of surgical threads for sutures.

3. What are the common diseases that are found in Poultry?
Answer:

Salmonellosis (diarrhea)	–	Caused by bacteria
Ranikhet disease, (Fowlpox)	–	Caused by virus
Aspergillosis	–	Caused by fungus

X. Assertion and Reason :

1. Assertion: Wool is the fibre derived from the fur of animals.
Reason: Animals like goat, Yak, Alpaca, and rabbit yields wool.
(a) Both Assertion and reasoning are correct
(b) Assertion is correct but the reason is wrong
(c) Assertion is wrong but the reason is correct
(d) Assertion and Reason are incorrect
Answer:
(a) Both Assertion and reasoning are correct

2. Assertion: Pencillin or ciprofloxacin.
Reason (R): These medicines cure cowpox.
(a) Assertion is correct Reason is wrong
(b) Assertion is wrong reason is correct
(c) Assertion is wrong reason is also wrong
(d) Assertion is correct and the reason is correct.
Answer:
(d) Assertion is correct and the reason is correct.

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28 Apr 2022