Landforms, Hey!: Crash Course Kids #17.1 - By Crash Course Kids
Transcript
| 00:09 | look outside your window for a sick and you'll probably | |
| 00:11 | see some buildings and streets , maybe telephone poles , | |
| 00:14 | hopefully some trees in there . To a lot of | |
| 00:16 | the world that we live in has been shaped by | |
| 00:17 | people and hey , no complaints because I'm plenty comfortable | |
| 00:20 | right here , but people aren't the only ones moving | |
| 00:23 | things around and shaping our world . Wind , rain | |
| 00:25 | and other elements do it all the time , Making | |
| 00:27 | shapes out of the earth we call landforms . So | |
| 00:29 | what are some kinds of landforms and how are they | |
| 00:32 | made first ? Remember that the earth is made of | |
| 00:38 | several spheres , including the hydro sphere , biosphere atmosphere | |
| 00:42 | and geo sphere . The solid part of the earth | |
| 00:44 | or geo sphere may look pretty stable , but it's | |
| 00:47 | always changing . Weathering and erosion by wind and water | |
| 00:50 | are constantly reshaping what our planet's surface looks like . | |
| 00:53 | And even if it takes so long that we don't | |
| 00:55 | usually notice it , it's happening . Let's check out | |
| 00:57 | our map to explore what kinds of landforms there are | |
| 00:59 | around the world . Well , mm hmm . Mountains | |
| 01:05 | are probably some of the most well known landforms , | |
| 01:07 | basically . They're just really big hills with steep sides | |
| 01:10 | that stretch way above the surface of the earth . | |
| 01:12 | Many mountains are formed when large plates or pieces of | |
| 01:15 | the earth's surface collide and are forced upwards , the | |
| 01:18 | low spaces in between . We call those valleys . | |
| 01:20 | But if mountains don't pique your interest , how about | |
| 01:23 | plateaus ? Plateaus are also tall landforms , but unlike | |
| 01:27 | mountains which tend to have the pointy tops , we | |
| 01:28 | know as peaks , Plateaus have flat tops . Plateaus | |
| 01:31 | come in lots of sizes . If they're medium sized | |
| 01:34 | . For example , they're called mesa's , which is | |
| 01:36 | the spanish word for table . Which is highly appropriate | |
| 01:38 | since plateaus kind of look flat and long like tables | |
| 01:41 | and if they're smallish , they're called beauts , no | |
| 01:43 | matter what they're called or what size they are . | |
| 01:45 | Plateaus can form in lots of different ways . Sometimes | |
| 01:48 | they're caused by the erosion or wearing away of mountains | |
| 01:51 | like by water or really big pieces of ice . | |
| 01:53 | Other plateaus are made by magma , which is really | |
| 01:55 | hot , melted liquid earth below the surface when magma | |
| 01:58 | swells up below the surface but can't break through , | |
| 02:00 | it can push up a flat chunk of land , | |
| 02:02 | leaving that table like formation behind . And speaking of | |
| 02:05 | magma , let's go to the pacific ocean on our | |
| 02:06 | map . For a good look at the most explosive | |
| 02:08 | landforms volcanoes . These landforms are found where the surface | |
| 02:11 | of the earth is relatively thin when magma breaks through | |
| 02:14 | the surface or erupts that hot liquid rock gets a | |
| 02:17 | new name lava and a new volcano is born hot | |
| 02:20 | stuff coming through hot is definitely a good term to | |
| 02:24 | describe another kind of landforms . Desserts , Desserts are | |
| 02:27 | landforms that lose more water to air than they get | |
| 02:29 | through rain , snow or other kinds of moisture . | |
| 02:31 | The world's largest desert is the Sahara . In northern | |
| 02:33 | Africa . Or daytime temperatures can climb to a sweltering | |
| 02:36 | 55°C just a wee bit out of my personal comfort | |
| 02:40 | zone . But then again , sore the cold temperatures | |
| 02:42 | in Antarctica , which is actually considered to be a | |
| 02:44 | desert to penguins in the desert , Who knew it | |
| 02:47 | right time to set sail for two more kinds of | |
| 02:49 | landforms , islands and deltas . You'll find deltas at | |
| 02:52 | the mouth or end of rivers where they meet the | |
| 02:54 | ocean . Deltas are formed when dirt and other debris | |
| 02:56 | that are washed down the river accumulate or build up | |
| 02:59 | to form a piece of land islands , on the | |
| 03:01 | other hand , can form any number of ways they | |
| 03:03 | might come from the cooled lava , underwater volcanoes or | |
| 03:06 | from a whole lot of dirt's and in pieces of | |
| 03:08 | coral building up due to ocean currents . Islands can | |
| 03:10 | even form by breaking off from a larger piece of | |
| 03:13 | land so they can form in lots of ways . | |
| 03:15 | But as long as it's surrounded on all sides by | |
| 03:17 | water , it's an island in our travels . Today | |
| 03:23 | , we took a look at lots of different kinds | |
| 03:24 | of landforms , which are natural features of the earth's | |
| 03:27 | surface . Landforms can stretch high above the earth's surface | |
| 03:30 | like mountains , plateaus or mesa's be created in or | |
| 03:33 | by water like deltas and islands , or even be | |
| 03:35 | dry like desert . So remember these things the next | |
| 03:38 | time you step outside underneath and beyond and all around | |
| 03:41 | the things that people have made their are landforms millions | |
| 03:44 | of years in the making . |
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