Science-Life needs food
Life Needs Food
Q1. What are the sources of Food?
Ans. Animal sources-
We get meat, milk, eggs etc from animals. Food items
obtained from animals contain proteins, Fats, Vitamins and Minerals.
Plant sources-
A large variety of seeds , fruits, leaves, stems, roots
and flowers of certain plants are used as food.
Food items obtained from plants contain carbohydrates,
proteins, fats, minerals, vitamins and fibre.
Q2. Write difference between Carnivores and Scavengers.
Ans. Scavengers Carnivores
1. Animals
that feeds on 1. Animals that hunt and
eat other dead animals . flesh of other animals.
2. Eg: wolf ,vulture,
eagle. 2. Eg: lion,tiger ,shark ,fox
Q3.Name the three major food groups. Give three examples of each food group.
Ans.1. Carbohydrates – Energy giving food .
eg. ghee, wheat ,
bread, potatoes.
2.Proteins - Growth and repair of
wornout parts of body. eg.milk, eggs, pulses,nuts.
3.
Vitamins and Minerals – Fight against diseases called as Protective food .
eg.
Carrot,mango,green leafy vegetables.
Q4. Write the symptoms and preventive measures of
Anaemia.
Ans. Anaemia
Anaemia is
mainly caused due to the deficiency of
the Iron in the body. Decreases the
total number of red blood cells (RBCs) or haemoglobin in the blood.
Symptoms-
•Pale
skin
•Flat
and pale nails
•Dark
patches under eyes
•Body
weakness
•Dizziness
and headache
Preventive measures
Intake of Iron-rich food items such as
•
Leafy vegetables
•
Pulses
•
Cereals
•Meat,
liver and fish
Q5. Write the symptoms and preventive measures of Scurvy
and Goitre.
Ans.Scurvy
Scurvy is
caused due to the deficiency of Vitamin C.
Symptoms
•Swollen
and bleeding gums
•appetite
loss
•severe joint
pain
•shortness
of breath
•weight
loss
Preventive measures
Diet rich in vitamin C such as
•Citrus
fruits
•Vegetables
•Germinated
pulses
•Lemon
Goitre
It is caused
due to the deficiency of Iodine. Iodine is essential for the formation of thyroxine .
Symptoms
•Enlargement
of the thyroid glands.
•Affects
the physical and mental growth of the children.
Preventive measures
•Iodised
salt
•Sea
food
Q6.State the sources and function of following:- (H.W.)
a) Vitamin k
b) vitamin
E
c) Calcium and Phosphorous
d) potassium
Q7. Define the
following:- (H.W.)
a)Nutrients b) Balanced Diet c) Malnutrition
d) deficiency diseases
Q8.
Give Reasons
1.Junk food is not good
for health.
Ans.
Junk food contains lot of carbohydrates and fats which leads to obesity and
heart diseases.
2.Balanced diet is not
same for everyone.
Ans.
Balanced diet varies for age and occupation
•A young child needs
to eat Protein rich food because during
childhood ,the bones and muscles are growing.
•A labourer doing hard
work needs more of carbohydrates and fats, as he needs more energy.
3.
Roughage do not provide nutrients still it is essential for our body.
Ans.
Roughage allow the waste matter to move more easily and prevent constipation.
For proper digestion we should have enough roughage or Dietary fibre in our
diet.
4. Vitamin D is also called as the Sunshine Vitamin.
Ans. Vitamin D is called the sunshine vitamin
because it can be formed by direct
sunlight.
It helps to absorb calcium and is
important for children to develop strong bones and teeth
