ICSE Worksheet for chapter-12 Energy Flow &Conservation class 9

Worksheet For class 9

Find ICSE Worksheet for chapter-12 Energy Flow &Conservation class 9

CLASS-9

BOARD: ICSE

Physics Worksheet - 12

TOPIC: Energy Flow &Conservation

For other ICSE Worksheet for class 9 Science check out main page of Physics Wallah.

SUMMARY

• Energy Flow And Its Importance
• Nutrient Flow
• Resources
• Energy Alternatives and Promotion of Renewable Energy Resources
• Disadvantages of Large Dams For Generating Hydro-Electric Power
• Efficient Use of Energy
• Social Initiatives

SECTION 1 – OBJECTIVE

1. Food chain begins with:
   1. Respiration
   2. Decay
   3. Photosynthesis
   4. Decomposition
2. The energy enters in the food chain through:
   1. Primary consumers
   2. Producers
   3. Secondary consumers
   4. tertiary consumers
3. The source of energy in an ecosystem is:
   1. Sun
   2. ATP
   3. Green plants
   4. Sugar
4. The place of human being in food chain in ecosystem is as:
   1. Producer
   2. consumer
   3. Decomposer
   4. Both (a) & (b)
5. The device which directly converts solar energy into electric energy is
   1. Motor
   2. Generator
   3. Solar cell
   4. Microwave
6. A renewable source of energy is
   1. Petroleum
   2. Coal
   3. Uranium
   4. Tree
7. A renewable source of energy is:
   1. Coal
   2. Kerosene oil
   3. Petroleum
   4. Biomass
8. The value of a resource depends on:
   1. Its quantity
   2. Its quality
   3. Its requirement to the society
   4. None of these
9. Which of the following is not a conventional source of energy?
   1. Coal
   2. Mineral oil
   3. Wood
   4. Sun
10. Name the agent which decomposes animal dung into biogas.
    1. Yeast
    2. Mould
    3. Anaerobic bacteria
    4. Fungus

SECTION 2 - SUBJECTIVE

1. What is biogas? Which component of biogas is used as a fuel?
2. Distinguish between the renewable and non – renewable resources.
3. Explain how wind energy is converted into electric energy?
4. What do you understand by the term hydroelectric power?
5. State two advantages and two limitations of hydel power.
6. What is solar panel? To what uses are the solar panels put?

Solutions: to worksheet-12 Topic-Energy Flow &Conservation

Objective Problems: