CBSE Class 7 Science Revision Worksheet Set O

Chapter 1: Nutrition In Plants

Fill in the blanks:

1. The components of food which are necessary for our body are called

2. Green plants synthesis their own food themselves by the process of

3. Is the mode of taking food by an organism and its utilization by the body.

4. Complex chemical substances such as ------------------------- are the products of photosynthesis.

5. Gas is produced during photosynthesis.

6. Organisms that are dependent on others for their nutrition are called

7. Are the tiny pores present on the surface

of the leaves and are surrounded by guard cells.

8. Is the ultimate source of energy for all living organisms?

9. Organisms which derive their nutrition from dead decaying matter are called

10. Some organisms live together and share shelter and nutrients, this is called

Name the following:

1. The bacterium that can take atmospheric nitrogen and convert it into a soluble form.

2. The insectivorous plant.

3. The mode of nutrition in mushrooms.

4. The indicator used to test the presence of starch in leaves.

Fill in the blanks:-

1. The heat is transferred from one place to another place by __________,_____ and ___________.

2. In solids heat is transferred by __________.

3. All _________ are bad conductors of heat.

4. Materials which do not allow heat to be conducted through them are called ___________.

5. The primary mode of heat transfer in a liquid is _________.

6. Saliva is secreted by the _______ in the mouth cavity.

7. _________ molar teeth are present in human adult

8. Finger-like projections in the walls of small intestine are called________________.

9. Absorption of water from the undigested food takes place in_____.

10. The process of throwing the solid waste out of the body is called________.

11. The main steps of nutrition in humans are ___________, ___________, ___________ , ___________ and ___________

12. The largest gland in the human body is ___________.

13. The stomach releases hydrochloric acid and ___________ juices which act on food.

14. The inner wall of the small intestine has many finger-like outgrowths called __

15. Amoeba digests its food in the ___________ .

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