A solar water heater cannot be used to get hot water on

1

(a)

A sunny day

(b)

A cloudy day

(c)

A hot day

(d)

A windy day

Which of the following is not an example of a bio-mass energy source?

1

(a)

Wood

(b)

Gobar-gas

(c)

Nuclear energy

(d)

Coal

Most of the sources of energy we use represent stored solar energy. Which of the following is not ultimately derived from the Sun's energy?

1

(a)

Geothermal energy

(b)

Wind energy

(c)

Natural energy

(d)

Bio-mass

Acid rain happen because

1

(a)

Sun leads to heating of upper layer of atmosphere

(b)

Burning of fossil fuels release oxides of carbon, nitrogen and sulphur in the atmosphere.

(c)

Electrical charges a produced due to friction among clouds

(d)

Earth's atmosphere contains acids.

Fuel used in thermal power plant is 

1

(a)

Water

(b)

Uranium

(c)

Biomass

(d)

Fossil fuels

Which one of the following forms of energy leads to least environment pollution in the process of its harnessing and utilization?

1

(a)

Nuclear energy

(b)

Thermal energy

(c)

Solar energy

(d)

Geothermal energy

Ocean thermal energy is due to

1

(a)

Energy stored by waves in the ocean

(b)

Temperature difference at different levels in the ocean

(c)

Pressure difference at different levels in the ocean.

(d)

Tides arising out in the ocean.

Which part of the solar cooker is responsible for greenhouse effect?

1

(a)

Coating with black colour inside the box

(b)

Mirror

(c)

Glass sheet

(d)

Outer cover of the solar cooker

Choose the correct statement?

1

(a)

Sun can be taken as an inexhaustible source of energy

(b)

There is infinite storage of fossil fuels inside the earth.

(c)

Hydro and wind energy plants are nonpolluting sources of energy.

(d)

Waste from a nuclear power plant can be easily disposed off.

Choose the incorrect statement

1

(a)

We are encouraged to plant more trees so as to ensure clean environment and also provide biomass fuel.

(b)

Gobar-gas is produced when crops. vegetable wastes etc., decomposes in the absence of oxygen.

(c)

The main ingredient of biogas is ethane and it gives a lot of smoke and also produces a lot of residual ash.

(d)

Biomass is a renewable source of energy

What is a good source of energy?

2

(a)

What is a good fuel?

2

(a)

If you should use any source of energy for heating your food which one would you use and why?

2

(a)

What are the disadvantages of fossil fuels?

2

(a)

How has the traditional use of wind and water energy been modified for our convenience?

2

(a)

Write three advantages of nuclear energy.

2

(a)

Can away source energy be pollution free? Why or why not?

2

(a)

Name two energy sources that you would consider to be renewable. Give reasons for your choices.

2

(a)

What are the qualities of an ideal source of energy?

2

(a)

What are the advantages and disadvantages of using a solar cooker? Are there places where solar cookers would have limited utility?

2

(a)

What are the environmental consequences of the increasing demand for energy? what steps would you suggest to reduce energy consumptions?

2

(a)

Why does a car parked in sunlight remains hot from inside even when there is no sunlight in the car?

2

(a)

What steps would you suggest to minimize environment pollution caused by burning of fossil fuels?

2

(a)

What is biomass? What can be done to obtain bio-energy  using biomass?

2

(a)

What are the limitations in obtaining energy from wind?

2

(a)

Which is the process used to harness nuclear energy these days? Explain it briefly.

5

(a)

Energy from various sources is considered to have been derived from the sun. do you agree? Justify your answer.

5

(a)