Wednesday, April 19, 2017
Tuesday, April 18, 2017
Science chapter 1- Life needs food- Extra questions
Define the following:
1.
Food: any nutritious substance that people or animals
eat or drink or those plants absorb in order to maintain life and growth.
2.
Herbivores: A herbivore is an animal that gets its energy from
plants. Eg: cow and goat.
3.
Carnivores: An animal that feeds on other animals. Eg: lion
and tiger.
4.
Omnivores: Omnivores can both eat plants and
meat.eg: human being, dog
5.
Producer: Photosynthesizing organisms. Producers are any
kind of green plant. Green plants make their food by taking sunlight and using
the energy to make sugar. The plant uses this sugar, also called glucose to
make many things, such as wood, leaves, roots, and bark.
6.
Scavengers: an animal that feeds on dead plant and animal
materials. Eg: wolf and vulture.
7.
Nutrients: A substance that provides nourishment
essential for the maintenance of life and for growth.
8.
Balanced diet: The daily intake of food which contains all the necessary nutrients in
the right quantities is called a balanced
diet.
9.
Malnutrition: lack of proper nutrition, caused by not having
enough to eat, not eating enough of the right things, or being unable to use
the food that one does eat.
Fill in the blanks
1.
Carbohydrates form a major portion of our body
and provide energy
2.
Sucrose is sugar we use and found in
sugarcane.
3.
Lactose is found in milk and fructose
in fruits.
4.
Proteins help the body in growth and repair
of worn out parts.
5.
Vitamins are essential for growth, to keep
the body healthy and to fight disease.
6.
Calcium and phosphorus makes bones
and teeth strong.
7.
Iron is needed by the body to make RBC.
8.
Potassium helps to keep muscles , brain and
nerves healthy and maintains amount of water in the body.
9.
Iodine is needed for proper growth of the
body and is found in iodised salt.
10.
Dietary fibres are also known as roughage.
Match the following (need to be done by students)
A
B
1.
Night blindness A) Iodine
2.
Rickets B)
Vitamin A
3.
Scurvy
C) Iron
4.
Goiter
D) Vitamin D
5.
Anaemia E)
Vitamin C
Give reasons
1.
Carnivores have canines.
Ans: Carnivores are the
meat eaters of the animal world, have very
defined canine teeth for
tearing the meat.
2.
Dietary fibres are essential for our body functions.
Ans: Fibre is an important part of a healthy balanced diet. It
can help prevent heart disease, diabetes, weight gain and some cancers, and also
improve digestive health.
3.
Children need more carbohydrates and proteins rich
diet.
Ans: children need more carbohydrate and protein-rich
food than grown-ups as their body parts need to grow.
Protein helps a child's body build cells, fight
infection, and repair damaged cell.
Carbohydrates are
actually the body's most important source of energy. It helps to carry out lots
of daily activities.
4.
Vitamin D is also called sunshine vitamin.
Ans: Humans make 90 percent of our vitamin D naturally
from sunlight exposure to our skin.
Answer the following
5.
Write sources of the following(need to be done by
students)
a)
Calcium and phosphorus
b)
Iron
c)
potassium
d)
iodine
6.
write the functions of the following in our body (need
to be done by students)
a)
Calcium and phosphorus
b)
Iron
c)
potassium
d)
iodine
7.
What happens if the child does not get proper
nutrition?
Ans: Insufficient
amount of vitamins and minerals in the food causes deficiency disease. Eg:
Rickets due to deficiency of vitamin D. Night blindness is due to deficiency of
vitamin A.
8.
Write symptoms and preventive measures of night
blindness?
Ans: It is caused due to deficiency of vitamin A. A
person suffering from night blindness loses the ability to see in dim light.
Drying of eye balls occur as the tear glands do not produces tears. Spinach,
eggs, milk, liver, butter and vitamin rich food will prevent and control this
disease.
9.
Write symptoms and preventive measures of Rickets?
Ans: Rickets
is a skeletal disorder that results from a lack of vitamin D, calcium, or
phosphate. Children with rickets can have weak and soft bones, stunted growth,
and, in severe cases, skeletal deformities. It can be cured by taking vitamin D
from various food products, including milk, eggs, and fish. Our body also
produces the vitamin when you’re exposed to sunlight.
10.
Write symptoms and preventive measures of scurvy?
Ans: The primary cause of scurvy is insufficient
intake of vitamin C.
Scurvy symptoms may begin with appetite loss,
poor weight gain, diarrhea, rapid breathing, fever, irritability, tenderness and discomfort in legs, swelling over long
bones, bleeding (hemorrhaging), and feelings of paralysis.
Scurvy can be
prevented by consuming enough vitamin C, either in the diet or as a supplement.
Foods that contain vitamin C include:
·
Oranges
·
Lemons
·
Blackcurrants
·
Guava
11.
Write a note about Anaemia
Ans: Anaemia is usually defined as a decrease in the total amount of
red blood cells (RBCs) or haemoglobin in the blood. It can also be defined as a lowered
ability of the blood to carry oxygen. Anaemia is caused by a deficiency of iron in
your body. Anaemia signs and symptoms are:
·
Fatigue
·
Weakness
·
Pale or
yellowish skin
·
Irregular
heartbeats
·
Shortness of
breath
·
Dizziness and
headache
12.
Write importance of water in our body
Ans: (1) water plays an essential function in helping the regulation of body temperature. Sweating from the skin surface cools the body very
efficiently.
(2) It helps to remove
the toxin material from the body
(3) It helps in digestion of food.
13.
Write difference between plant source and animal source.
Ans: Animal sources include many food items
that come from an animal
source. Eg meat, milk, eggs etc.
Plant sources include many food items
that come from plant source. Eg, seeds, flowers. Roots, fruits etc.
14.
Write difference between obesity and under weight.
Ans: When we keep eating less, the body is deprived of
the required amount of nutrients to maintain itself. We become
underweight. An underweight person is
weak and cannot fight sickness.
Subscribe to:
Posts (Atom)