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Edu-Primes
  • 8/29/2024
Transcript
00:00Hi kids, today we will learn about one of the most essential things for life on earth,
00:08that is water.
00:10So let's start.
00:13Our planet, the earth, is called blue planet because 70% of the earth's surface is covered
00:20with water.
00:23So a big part of the environment is water.
00:27Even in the air, water is present in the form of water vapors, and water is present beneath
00:35the earth's surface too, and that water is called underground water.
00:43Underground water is often used for agricultural, municipal, and industrial use by constructing
00:50tube wells.
00:52Now let's learn some properties of water.
00:56Water is colorless, it has no shape of its own.
01:00It takes the shape of the container it is poured into.
01:05Water has a fixed volume, but not a fixed shape.
01:11Let's try to understand this.
01:14That is, if you have 1 liter of water, it will remain 1 liter of water, no matter in
01:22which container you keep it.
01:25So its volume is fixed, but it will take the shape of the container in which you keep it.
01:33That is, it does not have a fixed shape.
01:38So water, or any liquid, has a fixed volume, but not a fixed shape.
01:46Now let's see other properties of water.
01:50Water exists in nature in three different states.
01:55It is liquid form, solid form, and gaseous form.
02:03Now let's learn it one by one.
02:07First of all, liquid form of water, water that we see in water bodies, water that we
02:15drink, water that we use, is all a liquid form of water.
02:22Solid form, when water is cooled below a certain degree of temperature, it freezes
02:28and that form of water is known as solid form of water.
02:33Ice, snowflakes, are all solid forms of water.
02:40One of the solid forms of water is very interesting.
02:44That is, snowflakes.
02:47Now let's see some of the beautiful shapes of snowflakes.
02:51If you look closely at snowflakes, you will see very beautiful formations.
02:58Each and every snowflake has a unique shape.
03:03Even no two snowflakes are alike.
03:08Most snowflakes have six sides.
03:12There are mainly three types of snowflakes known as a star, dendrite, and plate.
03:21Next time you see fluffy snowflakes drifting down from the sky, don't forget to take a
03:28closer look at them.
03:32Now let's learn another form of water.
03:36That is, gaseous form of water.
03:39Water in the form of steam or vapors is the gaseous form of water.
03:46Now let's learn how.
03:49One form of water changes to another one.
03:53When we heat water, some of the water changes into a gaseous state called steam, and this
04:01change of liquid state of water to gaseous state is called evaporation.
04:09Now let's see how the gaseous state of water changes back to a liquid state of water.
04:18Take a glass of hot water and now cover it with a lid.
04:23Now wait for a while.
04:26Now remove the lid and observe the side of the lid facing the hot water.
04:32You will find tiny droplets of water on it.
04:37This is the steam in the glass that converted back to water droplets, so this is the process
04:45where steam of water or gaseous form of water changes to liquid form of water, and the process
04:53is called condensation.
04:58Now let's see how the liquid form of water changes to a solid form of water.
05:06When the water is cooled down to a certain temperature, like 0 degrees, even below degree,
05:13water changes to a solid form, and this is called freezing.
05:19Now let's see how the solid form of water changes back to a liquid form of water.
05:25When the solid form of water, that is snow or the ice gets enough heat that its temperature
05:32rises above 0 degrees, it changes back to liquid form, and the process is called melting.
05:41Now let's learn what is precipitation.
05:45Water falling from the sky as rain, snow, or hail is called precipitation.
05:53Rainfall, snowfall, hailstorms are all examples of precipitation.
06:02So kids, today we learned a lot of properties of water, and also states of water.
06:09Now you may go ahead and take a quiz to learn more.
06:13Bye bye!