Q-4 Answer the following questions in brief.
1. Write the names of two plants and their parts useful as food.
2. Why do doctors usually advise us to consume fruits instead of fruit juices?
3. Why can't our elbows bend backwards?
4. Why does a blacksmith use heat to make various tools in his business?
5. A bag of cement kept in the open gets soaked in rain. What will be its condition on
the next day?
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Q-5(A) Choose the correct option from the given alternatives.
1. Which of the following statement is incorrect?
(a) Excess fat in the diet causes obesity.
(b) Fibre in our food is supplemented by animal products.
(c) Protein rich food is body enhancer.
(d) Vitamin rich food protects the body against diseases.
2. During vacation Radhika ate lots of dishes like Samosas, Puri, Malai, Peda etc.
What will she experiences now?
(a) Her body may become more obese.
(b) Her immunity will increase a lot.
(c) She will feel very hungry.
(d) Her digestion power will increase.
2
(B) Do as directed.
1. Not eating a balanced diet can lead to various diseases. Explain with example.
2. Salt dissolves in water. But as salt is constantly added to the water, at some point
salt appears at the bottom of the vessel. Why does this happen?
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2
Q-6 Answer the following questions. 9
1. How are yarns made from fibres? Give an example.
2. Briefly explain any one process to make fabric from yarn.
3. The snake does not move in a straight line on the ground. Explain.
4. The stem is like a two way street. Explain.
Answers
Answer:
1. Plants Consumable part
Spinach Leaves
Carrot. Root
Broccoli Flower
2 . Doctors usually advice us to avoid packeged fruit juices because it is made from the fruit pulp using lots of preservatives and stabilizers , which are not good for our health . Thus , Doctors usually advice us to avoid packeged fruit juices and to consume raw fruits.
3. Our elbow cannot move backwards because it has a hinge joint which allows the movement in one plane only..
4. Blacksmiths work by heating pieces of wrought iron or steel until the metal becomes soft enough for shaping with hand tools, such as a hammer, an anvil and a chisel. ... Because they must be able to see the glowing color of the metal, some blacksmiths work in dim, low-light conditions, but most work in well-lit conditions.
5. The cement when reacts with water, it gets hardened and set in the shape it is present. If due to rain, the cement bag has been wet, then the cement will react with water and will get hardened. This reaction is irreversible in nature and can not be reversed back.
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Answer:
1. Plants Consumable part
Spinach Leaves
Carrot. Root
Broccoli Flower
2 . Doctors usually advice us to avoid packeged fruit juices because it is made from the fruit pulp using lots of preservatives and stabilizers , which are not good for our health . Thus , Doctors usually advice us to avoid packeged fruit juices and to consume raw fruits.
3. Our elbow cannot move backwards because it has a hinge joint which allows the movement in one plane only..
4. Blacksmiths work by heating pieces of wrought iron or steel until the metal becomes soft enough for shaping with hand tools, such as a hammer, an anvil and a chisel. ... Because they must be able to see the glowing color of the metal, some blacksmiths work in dim, low-light conditions, but most work in well-lit conditions.
5. The cement when reacts with water, it gets hardened and set in the shape it is present. If due to rain, the cement bag has been wet, then the cement will react with water and will get hardened. This reaction is irreversible in nature and can not be reversed back.
Explanation: