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?
10
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?
4
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.
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