science chapter 1 Question e & f answer



E. Answer the following questions briefly

1. Name three food items which are rich in proteins.
→ Pulses, Eggs, Milk.

2. Why does a child need more proteins than an adult?
→ Because proteins help in growth and building of the body, and children are still growing.

3. What is a balanced diet?
→ A diet that contains all nutrients (carbohydrates, proteins, fats, vitamins, minerals, water, roughage) in the right amount.

4. What is roughage? Name two food sources rich in roughage.
→ Roughage is dietary fibre that helps in digestion and prevents constipation.
Sources: Fruits, Vegetables.

5. Why should the water in which pulses are soaked not be thrown away?
→ Because it contains dissolved vitamins and minerals which are good for health.


F. Answer the following questions

1. Which different nutrients are needed by our body?
→ Carbohydrates, Proteins, Fats, Vitamins, Minerals, Water, Roughage.

2. Explain what happens to food in the mouth.
→ Food is chewed, mixed with saliva, and saliva begins the digestion of starch into sugar.


G. Think and Answer

1. Why are sportspersons given glucose drinks during breaks in play?
→ Because glucose provides instant energy and makes them feel fresh quickly.

2. Why does a mason need more carbohydrates than an accountant?
→ A mason does heavy physical work and needs more energy. An accountant does light mental work, so needs less energy.


Other Questions (from top part of first image)

3. What is the function of small intestine?
→ To complete digestion and absorb nutrients into the blood.

4. Name three organs which produce digestive juices.
→ Liver, Pancreas, Stomach.

5. What is food preservation? How can food be preserved?
→ Food preservation means keeping food safe and usable for a long time.
Methods: Refrigeration, Drying, Canning, Salting, Pickling.


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