Quick Revision Coal and Petroleum Video Lecture - Science Class 8

0:0:0: have you ever been in a car do you know
0:0:3: what it runs on it runs on petrol or
0:0:7: diesel now where do this petrol and
0:0:10: Diesel come from today we're going to
0:0:13: talk about something really interesting
0:0:15: coal and
0:0:16: petroleum so what are they natural
0:0:20: resources are resources that exist
0:0:22: without any actions of
0:0:26: humankind thus water air soil minerals
0:0:30: coal forests crops and Wildlife are all
0:0:34: examples of Natural
0:0:36: Resources pretty much if it comes from
0:0:39: Earth and it wasn't made by humans it's
0:0:41: a natural
0:0:43: resource let's dive in and learn more
0:0:45: about them natural resources are of two
0:0:48: main types inexhaustible resources and
0:0:51: exhaustible
0:0:53: resources now let's talk about them in
0:0:56: detail inexhaustible resources are super
0:0:59: cool because they never run out they are
0:1:2: always available in nature no matter how
0:1:5: much we use them some examples include
0:1:8: solar energy wind falling water and
0:1:12: more these resources are always here for
0:1:16: us now let's talk about the other side
0:1:19: exhaustible
0:1:21: resources these are resources that are
0:1:23: limited if we use them all up there
0:1:26: won't be any left some examples in
0:1:29: include forests Wildlife minerals coal
0:1:33: petroleum and natural gas we have to be
0:1:37: careful with how we use these resources
0:1:39: because once they're gone they're really
0:1:42: gone petroleum is a special kind of
0:1:44: natural
0:1:45: resource it's a liquid fossil fuel
0:1:48: that's hiding deep under the ground we
0:1:51: use petroleum for lots of things in our
0:1:53: daily lives but it's important to
0:1:55: remember that there's only very less of
0:1:57: it under the Earth next next up let's
0:2:0: talk about coal Coal is a black or
0:2:3: brownish rock that we burn to create
0:2:6: energy coal is a black colored fossil
0:2:9: fuel which is extracted from the ground
0:2:11: and is used as a fuel for different
0:2:14: purposes it is hard like Stone substance
0:2:17: and black in color it has many uses
0:2:20: since old times like it was used as a
0:2:22: heat source to cook food to produce
0:2:24: steam to run the train and other engines
0:2:27: in thermal power plants to produce
0:2:29: electricity
0:2:30: and many more have you ever wondered how
0:2:33: coal is formed it all starts with the
0:2:36: remains of plants and animals from a
0:2:38: very long time ago remains of ancient
0:2:41: plants and animals called organic
0:2:43: material are buried in rock La
0:2:45: throughout time and over time they
0:2:48: transform into natural sources of energy
0:2:51: called fossil fuels coal oil and natural
0:2:55: gas this transformation happens because
0:2:57: of intense heat and pressure
0:3:0: it's like Nature's Own Way of
0:3:2: recycling coal is not just used as it is
0:3:6: it can be turned into other useful
0:3:8: things too when we process coal we can
0:3:11: get solid products like Coke liquids
0:3:14: like Cola and even gas Coke is used to
0:3:17: make Metals Co tar is used in making
0:3:20: dyes drugs and perfumes and coal gas is
0:3:24: a fuel it's amazing how one resource can
0:3:27: give us so many different products
0:3:30: Coke is a really important product we
0:3:32: get from coal it's hard porous and black
0:3:36: and it's the purest form of carbon we
0:3:39: use Coke mainly to make iron and other
0:3:42: metals it's super important for a lot of
0:3:46: Industries coal tar is another product
0:3:48: from coal and it's a thick black liquid
0:3:51: that doesn't smell very nice but it's
0:3:54: really useful because it's made of about
0:3:56: 200 different
0:3:58: substances we use are to make things
0:4:1: like synthetic dice drugs explosives and
0:4:5: perfumes when we process coal to get
0:4:7: Coke we also produce something called
0:4:10: coal gas coal gas is used as fuel it's a
0:4:14: great example of how we can use all
0:4:17: parts of coal to help us in different
0:4:19: ways let's talk about petroleum again
0:4:23: it's a natural resource formed from
0:4:25: organisms that lived in the sea a long
0:4:27: long time ago petroleum is a dark o
0:4:31: liquid mixture that has a very strong
0:4:34: AO just like coal petroleum is super
0:4:37: important in our daily lives petroleum
0:4:41: is formed in a similar way to Coal it
0:4:44: comes from the remains of ancient plants
0:4:46: and animals that get buried under Rock
0:4:49: leaves over time with lots of heat and
0:4:52: pressure these remains turn into
0:4:54: petroleum it's another cool example of
0:4:57: Nature's recycling process
0:5:0: petroleum is really
0:5:2: versatile through a process called
0:5:4: refining we can separate petroleum into
0:5:7: many different products like gas for
0:5:9: cooking petrol for cars diesel for
0:5:11: trucks lubricating oil paraffin wax for
0:5:14: candles and even bitamin for roads it's
0:5:18: like a treasure chest of useful stuff
0:5:21: but there's a downside to using fossil
0:5:24: fuels like coal and
0:5:26: petroleum first they're finite and non
0:5:28: renewable which means we can't replace
0:5:31: them once they're used up second burning
0:5:34: them contributes to global warming
0:5:37: because it releases greenhouse gases and
0:5:40: third it can lead to diseases and other
0:5:43: health issues it's important to be
0:5:45: mindful of these
0:5:47: problems so what can we do to help using
0:5:51: public transport and car pooling are to
0:5:53: great ways to reduce our use of petrol
0:5:56: and Diesel by sharing rides or using bus
0:5:59: buses and trains we can make a big
0:6:1: difference in Saving these precious
0:6:4: resources natural gas is another fossil
0:6:7: fuel just like coal and
0:6:9: petroleum but it's a bit different
0:6:11: because it's a gas and it's used in
0:6:14: waste treatment and
0:6:16: incineration natural gas is also a
0:6:18: nonrenewable fuel which means we have to
0:6:21: use it
0:6:22: wisely even though it's a fossil fuel
0:6:25: natural gas has some
0:6:26: benefits it doesn't leave Ash so it
0:6:29: reduces pollution it's aolis and it
0:6:32: produces more energy compared to some
0:6:34: other fuels it's a useful resource but
0:6:38: remember it's also limited let's wrap up
0:6:42: by remembering why natural resources are
0:6:44: so
0:6:45: important without them humans wouldn't
0:6:48: survive we use these resources every day
0:6:52: either directly or
0:6:54: indirectly they're a big part of our
0:6:56: lives and that's why we need to take
0:6:58: care of them
0:7:0: thanks for learning with me today about
0:7:2: coal and
0:7:3: petroleum we hope that you have
0:7:5: understood the topic you can now study
0:7:9: chapter notes watch video lectures and
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0:7:26: eight thank
0:7:27: you