Model question 1

                     **Section A: Multiple Choice Questions (2 marks each)**

1. Which of the following is not a renewable energy source?

   a) Solar power

   b) Wind power

   c) Coal

   d) Hydroelectric power

2. What is the main function of the lungs in the human body?

   a) Pump blood

   b) Digest food

   c) Control body temperature

   d) Exchange gases

3. Which planet is known as the "Red Planet"?

   a) Venus

   b) Jupiter

   c) Mars

   d) Saturn

4. What process involves the conversion of water vapor into liquid water?

   a) Sublimation

   b) Condensation

   c) Evaporation

   d) Precipitation

5. Which of the following is a conductor of electricity?

   a) Plastic

   b) Rubber

   c) Copper

   d) Wood

                      **Section B: Short Answer Questions (4 marks each)**

6. Explain the difference between a solid, liquid, and gas based on their molecular arrangement.

7. Describe the process of photosynthesis and its importance in the ecosystem.

8. What is the function of the nervous system in the human body? Provide examples of its components.

9. What are the three states of matter? Explain each with examples.

10. Define force and give examples of different types of forces.

                **Section C: Long Answer Questions (5 marks each)**

11. Discuss the importance of biodiversity in an ecosystem and the consequences of its loss.

12. Explain the structure and function of a plant cell and an animal cell.

13. Describe the water cycle and its significance in the environment.

14. Discuss the impact of human activities on the environment and suggest measures for conservation.

15. Explain the concept of simple machines and provide examples of each.