Page 32 - Science Class 06

Mental retardation : Improper development of brain in relation with age
Symptoms : The sign of the occurrence of any disease

Prevention : Protection against any disease

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i A nutrient is an organic or inorganic substance required for the survival of a living being.
i Fats give even double the amount of energy than the energy provided by the same amount of
carbohydrates.
i Energy is measured in calories.
i Different food items have different proportions of nutrients present in them.
i Vitamins protect our body from various diseases.

i Minerals also help our body parts to function properly.
i The diet containing all the essential nutrients in a right proportion is called a balanced diet.
i Kwashiorkor is a deficiency disease caused by lack of protein and energy in the body.

i Anaemia and goitre are the diseases caused due to deficiency of iron and iodine, respectively.

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A. Tick (3) the correct op on.
1. Iden fy which of the following minerals is not needed by our body.
(a) Calcium (b) Mercury
(c) Iodine (d) Iron
2. Which of the following is the main source of energy?

(a) Carbohydrate (b) Protein
(c) Mineral (d) Vitamin
3. _____________ protect our body from various diseases.
(a) Vitamins (b) Carbohydrates
(c) Proteins (d) Minerals

4. It is the deficiency disease caused by lack of protein.
(a) Kwashiorkor (b) Anaemia
(c) Scurvy (d) Night Blindness

5. Night blindness is caused due to deficiency of:
(a) Vitamin A (b) Vitamin B
(c) Vitamin C (d) Vitamin D
6. The deficiency of iodine may cause:

(a) night-blindness (b) rickets
(c) goitre (d) none of these

32 Science-6