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5th Sample Papers

Energy is in everything that exists in the universe. It is the capacity to perform some work. Each and every task in the world needs energy. As the energy is available in a variety of forms such as light, heat, sound, and movement, we have a plenty of options. Energy sources are classified into natural sources and artificial sources. Sun is the ultimate source of energy. All plants and animals require energy for their survival and life processes. We get energy through the food. One of the remarkable feature of energy is that it can be converted from one form to another. 

 1. Write down below about what works are being done in the figure?
Answer:

  1. Cycle riding
  2. Pulling
  3. Spraying organic or chemical fertilizers on the crop.
  4. Playing Games
  5. Walking with a luggage

 2.What are some instances where you use muscular energy in your day to day life?
Answer: We walk, run, climb, pull and push the things from one place to another with the help of muscular energy.

3.Write any four works you do using muscular energy.
Answer: Walking, climbing, pulling, pushing.

 4. Write about any work done by wind energy
Answer:

  1. Electricity generation from wind
  2. The wind energy produced by the ocean currents help push boats and ships from one place to another.

5.How can mechanical energy be converted into heat energy? Explain with an example.
Answer:When we rub our palms against each other, they become warm. The action of rubbing is a mechanical force that gets converted into the heat energy.

6.Write any two works done in your home using heat energy?
Answer:

  1. Cooking food by stove
  2. Boiling water using a heater

7.Write your known names of solar energy devices which are used by you.
Answer: I use solar batteries and solar cooker at home

 8. Define wind energy.
Answer: Any object that is moving has energy in it. Moving air also has energy. It is called wind energy.

 9. How is wind used to produce electricity
Answer: Windmills rotate due to the fast movement of wind. Turbines rotating due to this wind energy produce electricity.

10. How is water used to produce electricity?
Answer:Water stored in a dam has potential energy which converts into kinetic energy when water flows through the gates of a dam. Stored water flowing through the gates of a dam.

11.List the names of dams you know or which you have visited?
Answer:

  1. Kabini dam
  2. Alamatti dam

12.Write two situations of saving electricity?
Answer:

  1. Use natural light
  2. Unplug any appliances that aren’t in use.

13.Write any four works done by using electric appliances?
Answer:

  1. Washing machine – washing clothes
  2. Electric stove – cooking food
  3. Electric geyser – heating water
  4. Electric bulb – light purpose

 14. Write the uses of bio energy?
Answer:

  1. It is used for cooking.
  2. The energy available from biogas can be converted into electricity and may used for many works.

15. If you have appliances which make use of fuels at your home, name them?
Answer:

  1. Cooking purpose
  2. Vehicles

 16. Name the forms of energy.
Answer:

  1. Muscular energy.
  2. Mechanical energy.
  3. Heat energy.
  4. Solar energy.
  5. Wind energy.
    6. Hydro energy.
  6. Electrical energy.
  7. Chemical energy.

17.Think how energy changes from one form to another form in –

  1. A solar cooker
  2. An electric heater.

Answer:

  1. We get heat and light energy from the sun, From solar energy, we can prepare food using solar cooker.
  2. Electrical energy is generated at power stations and supplied to our homes.

18. State the law of conservation of energy.
Answer: Energy can neither be created nor destroyed. It changes from one from to another. The total energy remains constant. This is called law of conservation of energy.

Question 19.Name three appliances where electrical energy is used.
Answer: Appliances such as electric iron, computer, washing machine etc., use electrical energy.

Question 20. In the following activities write that the energy changes from which form to what form?
Answer:

Running of petrol car

Chemical energy (fuel)

Mechanical energy

Speaking

Muscular energy

Sound energy

Ironing clothes

Electrical energy

Heat energy

Drying up of pappad in

Solar energy

Wind energy

Cooking food using biogas (Gober gas)

Fuel energy

Heat energy

Glowing of an electric bulb by a rotating turbine.

Electrical energy

wind/ water energy.

 

Question 21.By using clues in the bracket, write the alternate energy used [solar water heater, goober gas, solar cooker, solar cells].
Answer:

Activity

Alternate energy used

1. Instead of hearth
2. Electric geyser
3. Cooking rice on the hearth
4. Electric bulb
5. Listening to radio using electric

Goober gas
Solar water heater
Solar cooker
Solar cells
Solar cells

 

Question 22.
Use the clues in the bracket and write which alternative energy can be saved by following activities given below. [Fuel, chemical, electric, charcoal]
Answer:

Activity

Saved alternate energy

1. Traveling by Bicycle

Fuel

2. Washing clothes by hand

Electric

3. Generating electricity from wind

Chemical

4. Cooking food using gobar gas

Charcoal

5. Avoid turning on the radio when there is no electricity

Chemical

 

Multiple choice Questions:

1.The energy that we get from the sun is called
a. Solar energy
b. Muscular energy
c. Wind energy
d. Water’s stored energy
Answer: a. Solar energy

 2. The kind of energy produced in gobar gas plant is
a. Heat energy
b. Chemical energy
c. Bioenergy
d. Electrical energy
Answer: c. Bioenergy

Fill in the blanks:

  1. The ability to do work is energy
  2. The energy which is released by burning of fuels is heat energy
  3. Any object that is moving has kinetic energy in it.
  4. The SI unit of energy and work is Joule

Answer the following Questions:

1.Distinguish between potential and kinetic energy

Answer:
Energy possessed by a body due to its position is called potential energy. Energy possessed by a body due to its motion is called kinetic energy.

2.Define photosynthesis.

Answer:
Plants prepare their food using sunlight. This process is called photosynthesis.

3.Define a hydroelectric power plant
.
Answer:
The running water hits the turbine with great force, which in turn produces electricity. Such a power station is called hydroelectric power generating station.

4.Define biogas (or) gobar gas.

Answer:
On decaying in the absence of Air, animal dung, plant residues and agricultural wastes produce a gas called biogas (or) gobar gas.

5.Define biogas (or) gobar gas.
List the dams built across rivers and hydroelectric power generating stations in Karnataka?
Answer:

  1. Almatti Dam
  2. Kabini Dam
  3. Mahatma Gandhi Tail Race
  4. Varahi Dam