CBSE Class 7 Social Science Revision Assignment Set 02

Q1. Why was Shahjahan known as the “Prince of Builders” or Engineer King? Name the important buildings constructed by him.

Q2. Write a short note on the monuments built by Akbar.

Q3. Which is your favourite historical monument. Gather information about it.

Q4. Architectural styles have changed over thousands of years. Write about this transition in the medieval period and compare it with the architectural styles that are prevalent in today’s world.

Q5. The rulers built beautiful forts and palaces to display their power and wealth. Discuss in detail to whom did they display their power and wealth.

Topic : Nutrients in animals

Learn and write the following key words-

1. Ingestion –The acts of getting and eating food collectively are called ingestion. In human beings, ingestion takes place through the mouth.

2. Digestion- The breakdown of food into simpler and soluble molecules inside the body is called digestion. The process of digestion begins in the mouth and is completed in the stomach.

3. Absorption –The process by which soluble molecules present in the digested food passes into the body fluids like blood is called absorption. In human beings absorption takes place in the small intestine.

4. Assimilation –The process in which the absorbed food is used for producing energy and growth is called assimilation.

5. Egestion-The process by which the undigested food materials are thrown out of the body is called egestion.

6. Enamel –It is the white part of a tooth and is the hardest substance in our body. It is deposited outside the crown of the tooth. Enamel contains calcium salts.

7. Saliva- The salivary glands release a digestive juice called saliva in the buccal cavity .Saliva makes the chewed food wet and slippery. This makes the swallowing of food easier.

8. Intracellular digestion- The digestion that occurs inside the cell is called intracellular digestion.

9 Extracellular digestion- The digestion that takes place outside the cell is called extracellular digestion.

10. Nutrition- The process of taking food and its utilization by the body is called nutrition.

QI Fill in the blanks-

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

2_________ molar teeth are present in human adult.

3 Finger-like projections in the walls of small intestine are called___.

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

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

QII Answer the following questions-

1 Name two organisms that live on liquid food only.

2 Name the cavity in unicellular animals in which food is present.

3 What is the white hard substance that covers the teeth?

4 Name the process in which absorbed food is used for producing energy.

5 What is the sticky film on the teeth consisting of food particles, saliva and bacteria called?