Aditya suggests his family to install a solar water heater for their residence. But, some of the family members were in favour of installing an electric geyser.
(a) Who according to you is taking a correct decision ? Mention the value exhibited by Aditya.
(b) Also give reasons (atleast two) for your answer.
CBSE Class X Science SA 2 (3 Marks)
Answers
Aditya is
taking a correct decision. The value exhibited by Aditya is the 'awareness
about energy conservation'.
(b) The reasons are :
(i) Solar water heater runs on renewable source of energy.
(ii) Solar water heater saves electrical energy produced by burning fossil fuels. Thus, it helps in reducing global warming.
(a) The discarded material of nuclear industry such as remains of the radioactive products of nuclear reactions is called nuclear waste.
(b) The waste material possess radioactive rays
that emit particles. These particles can damage human, animal and plant tissues.
(c) Nuclear vaster have to be buried deep inside the Earth.
Solar power is a renewable and clean energy source. The costs of installation are some what high. But there are government rebates. The investment will be returned in a few years. Then it will be free.
We have energy crisis in India and world over. The conventional energy sources are generating a lot of pollution and green house gases. So in order to preserve energy from conventional sources, reduce pollution and use renewable clean energy, we need to use solar energy.