1. Choose the correct word from those given in the parentheses:

AIDS is caused by (virus/bacteria)

Endocrine glands are those which secrete (hormones/enzymes)

The study of interaction of organisms with their environment is called (Ecology/Topology)

INSAT-2D circles the Earth once in every (48 hours 24 hours)

About 78% of the gaseous component of our atmosphere is (oxygen/nitrogen)

2. State whether the following statements are True or False

Pythagoras contributed in the development of Geometry in the Iron Age.

Wind is a renewable energy resource.

Green plants make up the first trophic level in an ecosystem.

The loudness of noise is measured in Lux.

Egg is a body building food.

3. Match the items given under Column A with those given under Column B

Column A Column B

Antonie Van Leeuwenhoek Number Theory

Plantation crop Air-borne disease

S. Ramanujan Coconut

Protein Observation of bacteria

Chicken pox Soyabean

SECTION B

Answer the following questions. Limit your answers up to 200 words for each question. All questions carry equal marks.

4. Write about the most important current theory for the origin of universe. Describe any two evidences that support this theory.

OR

Briefly discuss the role of Bio-technology in agriculture.

5. With the help of clear and well-labelled diagrams explain how solar and lunar eclipses occur.

OR

By citing an example, explain the various aspects of cognitive learning.

6. Make a clear and well-labelled diagram to explain the energy flow through an ecosystem.

OR

Describe, Pasteur's experiment that disproved the theory of spontaneous generation. Support your description with suitable diagrams.

7. Write the physical features of oceans and coasts and the ecological crises in the oceans and the coastal areas.

OR

Describe the various ways of management of soil.

SECTION C

Answer the following questions. Limit your answers up to 300 words for each question. All questions carry equal marks.

8. Discuss with the help of suitable examples the role of communication technology in imparting education through distance mode.

OR

What is meant by 'technology transfer' Describe in detail the problems faced by any country while importing technology.

9. Discuss the importance of nutrition for the health of a person. State the different nutrient groups with their respective functions.

OR

Explain how science influences the entire society and in turn how society influences scientific development. Give appropriate examples in your answers.

10. Write short notes on any three of the following:

Decline of the Bronze Age Civilization

Development of technology in the Mauryan Empire

Technical development in Feudal society

An example that demonstrates the method of science

Fibre optics technology