Question

Choose the correct option from the following: 1] Plants take carbon dioxide from the atmosphere mainly through their:
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(i) Roots
(ii) Stem
(iii) Flowers
(iv) Leaves


2] Cud is the name given to the food of ruminants which is:
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(i) swallowed and undigested.

(ii) swallowed and partially digested.
(iii) properly chewed and partially digested.
(iv) properly chewed and completely digested.
Correct answer
(ii) swallowed and partially digested.

3] Which of the following does not yield wool?
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(i) Yak
(ii) Camel
(iii) Goat
(iv) Woolly dog


4] Silk is derived from
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(i) cocoon
(ii) pupa

(iii) egg
(iv) moth
Correct answer
(i) cocoon

5] An iron ball at 40°C is dropped in a mug containing water at 40°C. The heat will:
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(i) flow from iron ball to water.
(ii) not flow from iron ball to water or from water to iron ball.

(iii) flow from water to iron ball.
(iv) increase the temperature of both.

6] Bile is produced in
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(i) Gall bladder
(ii) Blood
(iii) Liver

(iv) Spleen
Correct answer
(i) Gall bladder

7] Tomato is a natural source of which acid?
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(i) Acetic acid
(ii) Citric acid
(iii) Tartaric acid
(iv) Oxalic acid


8] Which part of the plant takes in carbon dioxide from the air for photosynthesis?
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(i) Root hair
(ii) Stomata

(iii) Leaf veins
(iv) Sepals

9] A wooden spoon is dipped in a cup of ice-cream. Its other end:
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(i) becomes cold by the process of conduction
(ii) becomes cold by the process of convection
(iii) becomes cold by the process of radiation
(iv) does not become cold


10] What happens when a solution of an acid is mixed with a solution of a base in a test tube? (A) Temperature of the solution decreases (B) Temperature of the solution increases (C) Temperature of the solution remains the same (D) Salt formation takes place
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(i) (A) and (D)

(ii) (A) and (C)
(iii) (B) only
(iv) (B) and (D)
Correct answer
(iv) (B) and (D)

2] Mark ‘True’ if the statement is true and ‘False’ if it is false: 1] Nitric acid turns red litmus blue.
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True
False


2] Carbon dioxide is released during photosynthesis.
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True

False
Correct answer
False

3] The tongue helps in mixing food with saliva.
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True

False

4] Our sense of touch about hotness or coldness is not always reliable.
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True

False

5] Wool and silk are the animal fibres.
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True

False

3] Fill in the blanks: 1] Clothes of ___________ colours absorb heat better than clothes of light colours.
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Dark .

Correct answer
dark

2] The hotness of an object is detetmined by its ____________ .
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Temperature .

Correct answer
temperture

3] The largest gland in the human body is ___________.
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Liver .

Correct answer
liver

4] Silk fibres are made of a ________________
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Fibroin .

Correct answer
protein

5] The inner wall of the small intestine has many finger-like outgrowths called ___________
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Villi .

Correct answer
villi
4] Match the following.
a] Pitcher plant b] Amino acid c] Food of silkworm d] Night e] Summer Score
1] Land breeze blow during
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2] Light coloured cloths are preferred during
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3] Insects
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4] Proteins
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5] Mulberry leaves
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1] Land breeze blow during
2] Light coloured cloths are preferred during
3] Insects
4] Proteins
5] Mulberry leaves

5] Draw the diagram of digestive system and label it​

Answer 1

Answer:

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Answer 2

Answer:

1. leaves

2.swallowed partially and digested

3.wooly dog

4.cocoon

5.