Science Ch-1 Sources of food(notebook exercise, Topics Taught, Additional Questions)

 

04/04/2020 

Topic Taught-Need for food, Sources of Food

Refer PPT [Refer Student Resources] and Textbook.

07/04/2020

Topic Taught-Plants sources of food; Vegetables, Oils, Pulses, Fruits, Spices

Refer PPT [Refer Student Resources] and Textbook.

08/04/2020

Topic Taught-Producers, Herbivores, Cudding, Ruminants, Carnivores , omnivores, scavengers and decomposers.

Refer PPT [Refer Student Resources] and Textbook.

09/04/2020

Topic Taught-Discussed Textbook Exercise.

10/04/2020

Topic Taught-Discussed Workbook Exercise.

13/04/2020

Topic Taught-Revision sources of food.

KEYPOINTS:-

·                   The different types of food products that are obtained from plants are called plant sources of food.

·                   Various food products such as vegetables, fruits, grains, pulses, cereals, tubers etc are obtained from plants.

·                   The different types of food products that are obtained from animals are called animal sources of food.

·                   Milk, eggs, honey, meat, fish and crabs are some examples of food obtained from animals.

Depending on food habits, animals are categorised as herbivores, carnivores, omnivores, scavengers and decomposers.

Important Questions

Chapter 1 – Sources of food

 Fill in the blanks 1-mark questions

1.   Green plants are known as_____________

Answer- producers

2.   Plants synthesizes food through____________

Answer-photosynthesis

3.   Milk is rich source of_______________

 Answer- protein and calcium

4.   Process of making cheese is known as_________________

Answer-curdling

5.   Anything that an animal, plant or human eat to nourish their body for proper growth and maintenance is called_________

Answer- food.

 Very Short Answer Question 2 marks questions

1.   What are the different sources of food?

Answer - Plants, plant products, plant parts, animals, animal products can serve as different sources of food.

2.   What are different components of food?

 Answer - Different component of food are carbohydrates, proteins, fats, vitamins and minerals.

3. Why do we need food? 

 Answer - Food is needed to meet the body nutritional requirement. Body need balanced diet to fight against diseases as well as deficiency caused due to absence of different components of food.

3.   What are different edible parts of the plants?

Answer - Fruits, leaves, roots are three main parts of the plants that are edible.

4.   Name three products that are given by plants and animals individually?

 Answer - Three plant products are vegetables, grains and cereals. Three animal products are egg, milk and meat.

5.   Define food?

 Answer - Food is defined as edible substance which is consumed by humans and animals to get energy needed for the survival of the living organisms.

6.   Define herbivores?

Answer - Organism that feed on plants or plant products are known as herbivores.

7.   Define carnivores?

Answer - Organisms that feed on animals or animal products are known as carnivores

8.   Define omnivores?

Answer - Organisms that feed on both plants and animals are known as omnivores.

9.   Why we should prefer cooked food?

 Answer - Cooked food is necessary to kill all the harmful germs if present in the raw food. Cooked food is easily digested by the body and can also be absorbed by our body easily.

10.                     What are scavengers?

Answer - Organisms that feed on the flesh of the dead animals, they are known as scavengers.

11. Define crop?

Answer - When plants of same type are cultivated and grown on large scale, they are known as crops.

Long Answer Questions

1.   Differentiate between herbivores, carnivores and omnivores with example for each of them?

Answer - Herbivores are plant eating animals such as cow, goat etc. Carnivores are animal that consume animal or animal products such as lion, tiger etc. Omnivores are those that consume both plants and animals such as humans, rodents etc.

2.   What is food and its significance?

Answer - Food is defined as edible substance which is consumed by humans and animals to get energy needed for the survival of the living organisms. It contains various components such as carbohydrates, proteins, fats, vitamins and minerals. Food is important to provide energy needed for the different activities such as walking, running etc. Food helps in the growth of the organisms. It is also needed for the repair of the damaged parts of the body.

3.   Explain the preparation of honey and ghee?

Answer - For the preparation of honey, nectar is present in the flowers. This nectar is collected by honey bees and stored in beehives. Then the honey can be extracted from the beehives. For the preparation of ghee, milk is obtained from the cow. Then cream is extracted from it. Then this cream is converted into butter and finally butter is boiled and ghee is formed.