Page 137 - SST Class 08

Tidal Energy industrial and domestic consumers. The following
measures can be adopted to conserve energy
The sea beaches experience the phenomenon of
tides, both spring tides and neap tides, round the resources :
clock. These tides have the potential of generating 1. The efficiency of power stations should be
great energy and can be harnessed, especially in increased.
the countries which have long coastal areas. 2. Waste from industries, incinerators and power
France is already making use of this energy.
stations should be used in direct heating.
Russia, France and the Gulf of Kuchchh in India
3. Waste should be burnt to generate power.
have huge tidal mills farms.
4. Machinery and appliances should be made
Activity more efficient.
Find out the sources of electric power in your state 5. Alternative sources of energy should be used,
or area you live in.
such as gobar gas, biogas etc.
CONSERVATION OF ENERGY RESOURCES 6. As far as possible, the
public transportation
Conservation of energy has become the need of should be made
the time. It can be possible by using renewable
efficient so that more
sources of energy. The oil reserves are dwindling people can use them
fast and the world is facing energy crisis which is in place of private
going to become more acute in the times to come. A gobar gas plant
vehicles.
Therefore, it is necessary to conserve energy by
reducing losses in transmission and usage by both 7. The people should be encouraged to share
private vehicles.

v Minerals have played an important role in the progress of civilisation.
v Colour, hardness, ductility, opacity and solubility are some of the characteristics of different minerals.
v Minerals can be classified into metallic and non-metallic minerals.
v The work of extracting minerals from the earth is called mining.
v Conservation of minerals can be done by recycling, using efficient methods of production and using
substitutes.
v The sources of energy can be classified into conventional and non-conventional sources.
v Non-conventional sources of energy can play an important role in meeting energy needs of the modern
world.

v Conservation of energy resources is essential to postpone their depletion.

A. Tick (3) the right option :
1. ____________ of a mineral shows that it is transprent.
(a) opacity (b) solubility (c) none of these
2. A ferrous mineral has ____________ content.

(a) iron (b) gold (c) silver
Minerals and Energy Resources
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