8th std Social Science Chapter- 3. Mineral and power resourcesNavya Rai
8th std Social Science Chapter- 3. Mineral and power resources
Minerals are naturally occurring substances that have a definite chemical composition.
Minerals are formed in different types of geological environments, under varying conditions.
Minerals can be identified on the basis of their physical properties such as colour, density, hardness and chemical property such as solubility.
Minerals are distributed in rocks and sea bed also.
Tropical regions are very rich in terms of mineral resources.
This presentation describes lots about the metals and non-metals. It also talks about the periodic tabe, physical and chemical properties of metals and non-metals and usses of them. Go ahead and learn beyond the Earth's crust as scientists still continue to dicover new things around the earth. After going through this presentation you will have complete understanding about the metals and non-metals.
Enjoy!!
Grade 10 - Chapter 5. Mineral and Energy ResourcesNavya Rai
Grade 10 - Chapter 5. Mineral and Energy Resources
Mineral is defined as a “homogenous, naturally occurring substance with a definable internal structure.”
Minerals are found in varied forms in nature, ranging from the hardest diamond to the softest talc.
Rocks are combinations of homogeneous substances called minerals.
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5.
What is ore?
Ore is a naturally occurring substance from
which minerals can be extracted.
What is mineral?
A naturally occurring, homogeneous
inorganic solid substance having a definite
chemical composition.
Eg. Gold and silver ---- inorganic
Coal and Petroleum ---- organic
7. Metals are Good Conductors of Heat and Electricity
Metals have a shiny appearance or luster
Metals can be easily beaten into a thin sheet (malleable)
Metals are heavy - dense
Metals are hard
Metals only melt when they are extremely hot - heat resistant
Metals are sonorous (they make a bell-like sound)
Metals bend rather than break, they are elastic
Properties of Metals
8.
Non-metals vary greatly in their appearance.
They are not lustrous and are generally poor conductors of
heat and electricity.
The melting points of non-metals are generally lower than
those of metals. However, diamond, an allotropic form of
carbon, has a high melting point of 3570 degree Celsius.
Non-metals are not malleable and ductile, like the metals.
Eg. Limestone, Mica, Gypsum, Coal, Petroleum, etc.
Non-metals
9.
Ferrous – Minerals contain iron
Non-ferrous – Minerals do not contain iron
Ferrous and non-ferrous
minerals
17.
The mineral content of the ore/
Concentration of mineral in the ore
The type of formation or
structure/ The ease of extraction
The cost of extraction/ Closeness
to the market
What are the three factors that make
mineral extraction
commercially/economically viable?
22.
Distribution of
Minerals in India
1. Peninsular
India
2. West and East
coasts and
Assam
3. Rajasthan
4. Northern Plain
23.
Concentration of mineral in the
The ease of extraction
Closeness to the market
Q. Describe any three factors which play a very
important role in turning a mineral reserve into a mine.
24.
Minerals are non-renewable resources.
It takes 1000s of years of the formation
The rate of formation is much smaller
than the rate at which the humans
consume the minerals.
Why conservation of
minerals is necessary?
25. Conventional sources of energy.
They are exhaustible except water
They cause pollution when used, as they emit
smoke and ash
They are very expensive to be maintained,
stored and transmitted as they are carried over
long distance through transmission grid and
lines.
Egs. Coal, petroleum, natural gas, firewood,
hydel power
Distinguish between conventional and
non-conventional sources of energy.
26.
Non-conventional sources of energy.
They are inexhaustible
They are generally pollution free
Less expensive due to local use and
easy to maintain
Egs. Solar, wind, tidal, biogas,
geothermal
Distinguish between conventional and
non-conventional sources of energy.
27.
Aluminium is highly reactive metal
and it reacts with the food processed
in aluminium utensils or wrapped in
aluminium foil.
When we wrap food in aluminium
foil it leach out and make it harmful
for our health.
Aluminium & its side effects
28.
More the food is heated more will be the
leaching.
It is more reactive to the acidic and
spicier food.
It is easily absorbed by the acidic food.
