Lesson -1 Food
-where does it come from.
Question - What
is food?
Answer - The substance that is eaten to obtain energy
is called food.
Question - What
are nutrients?
Answer - Substances that provide nutrition are called
nutrients.
Question - What
is nutrition?
Answer - The process of intake of food and making use
of it, is called nutrition.
Question -h How
many types of organisms are on the basis of mode of nutrition ?
Answer - Two types....
1.
Autotrophic
2.
Heterotrophic.
Question - What
are autotrophs ? Give one example.
Answer - The organisms that prepare their own food are
called autotrophs. For example- green plants.
Question- What
are heterotrophs? Give example.
Answer - Those organisms which depend on other
organisms for their food are called heterotrophs.
For
example - Humans, animals.
Question -
Define photosynthesis.
Answer - The process of preparing food by green plants
in the presence of sunlight is called photosynthesis.
Question -
Write down the raw material required for photosynthesis.
Answer - Raw material required for photosynthesis
are....
1. Carbon
dioxide
2. Water
3.
Sunlight.
Exercise....
Question - Fill in
the blanks.
1. Materials required for preparation of a food are
called ingredients
.
2. White part of an egg is called albumen .
3. Plants prepare their food by the process of photosynthesis .
4. Mustard seeds and leaves are used as food .
5. Honey bee collects nectar of flowers .
Question - Write
true or false.
1. All animals are carnivorous = False.
2. Root of sweet potato is used as food = True.
3. Egg is not considered as good food material as it
does not contain protein = False.
4. Stem of sugarcane is used for preparing juice ,
sugar and jaggery = True.
5. Butter, curd and honey are prepared from milk = False.
Question - Match
column A and column B.
A B
Carrot
Pulses
Gram, Peas Fruit
Wheat, Rice Root
Potato Grains
Orange
Stem
Answers.
A B
Carrot
Root
Gram, Peas Pulses
Wheat, Rice Grains
Potato
Stem
Orange
Fruit.
Question - Choose
the correct option .
1. Which animal
is omnivore among the following?
A) Lion
B) Hawk
C) Deer
D) Crow (✓)
2. Which part
of cabbage is used as food?
A) Stem
B) Roots
C) Leaves (✓)
D) None of the above.
Very short answer
type questions:
Question- What
are ingredients?
Answer- The material required for preparation of any
food item is called ingredient. For example - to prepare kheer, ingredients are
rice, milk, sugar etc.
Question -
Write any three products obtained from milk?
Answer - 1. Cheese
2. Curd
3.
Butter.
Question -Name
any two seeds used as spices in food items.
Answer - 1. Coriander.
2.
Cumin,
3.
Fengreek.
Short answer type
questions:
Question - How
seeds are main source of food for humans?
Answer - Most part of our food consists of grains and
pulses. Grain and pulses are considered as the seeds of plants. So we can say
seeds are main source of food for humans.
Question - What
is the importance of food in living organisms?
Answer - Living organisms require energy to do any
work and for growth of their body. This energy is provided by food.
Question -
Write a short not on any two food materials obtained from animals.
Answer - 1. Milk:
Milk is very useful product. It is obtained from milch animals. For example -
cow, buffalo, goat etc.
2. Meat:
Flesh of animals is called meat. Meat of cock, fish etc. contains a huge amount
of protein and fats.
Long answer type questions:
Question - How
are animals classified on the basis of their food habits. Explain by giving examples.
Answer - Animals are classified into three categories.
1. Herbivores
- Those animals which take plant or plant products as their food. For example -
cow.
2. Carnivores
- Those animals which take flesh of other animals as their food. For example -
lion, Tiger.
3. Omnivores
- Those animals which take plant and animals as their food. For example -
humans, dogs .etc
