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The round ball where you live on

timmy chakrit

on 21 April 2010

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Transcript of -Earth-

Double click anywhere & add an idea Introduction Earth is a round ball where we live, in this prezi we are going to talk about earth but we not going to talk about the whole thing because information about the earth is way too much. In this Prezi is all about the basic knowledge about Earth and PREPARE. Image from http://www.spacetoday.org/images/SolSys/Earth/EarthBlueMarbleWestTerra.jpg EARTH EARTH
-How old ?
Earth is pretty old but not as old as the universe, universe is about 14 billion years old but Earth is about 4.5 billion years old
Where on earth is earth ?
Earth is in the galaxy called Milky Way which has billions of stars. One of them is our sun; Earth is the third planet from the sun.
-What’s on earth ?
Earth is a home to millions of species of living things. 71 percent is earth is salt water and 29 percent of them is land and fresh water.
Image from
http://www.newscientist.com/data/images/ns/cms/dn9761/dn9761-2_800.jpg How big is the Earth The earth is big for a person but not for the sun, 1 million Earth could fit in the sun.
Image from http://share.psu.ac.th/file/teerawat.t/earths-size-compared-to-sun.jpg Surface area of the Earth: 510,072,000 km square Diameter: The Earth has an average diameter of 12,742 kilometers. (7,926 miles) Earth Atmosphere 78percent nitrogend 21 percent oxygen and 1percent other. The Earth’s atmosphere extend up about 80 kilometer. Left image from http://en.wikipedia.org/wiki/File:Atmosphere_gas_proportions.svg Right image from
http://en.wikipedia.org/wiki/File:Atmosphere_layers-en.svg Intresting Video from youtube Intresting Fact About Earth
1.It's actually 23 hours, 56 minutes and 4 seconds. This is the amount of time it takes for the Earth to completely rotate around its axis; astronomers call this a sidereal day.

2.Earth is mostly iron, oxygen and silicon
If you could separate the Earth out into piles of material, you'd get 32.1 % iron, 30.1% oxygen, 15.1% silicon, and 13.9% magnesium. Of course, most of this iron is actually down at the core of the Earth. If you could actually get down and sample the core, it would be 88% iron. 47% of the Earth's crust consists of oxygen.

More at http://www.universetoday.com/guide-to-space/earth/10-interesting-facts-about-planet-earth/

by Tim Y7a
Tutor Mr.Mark
and Mrs.Cook
Full transcript