The Earth on Thursday, April 14th 2011

Hey Everyone,

(The Earth from Space)
On Thursday I did my presentation on our very own planet, The Earth.

The Earth's name came from the English/German name which means ground.

The Earth's diametre at the equator is 12,756.32 kilometres. The Earth's mass is 5.97 x 10^24 kilograms. The Earth's density is 5.51 grams per cubic centimetre.

The Earth revolves around the Sun. It takes approximately 365 days to revolve around the sun.

The Earth is tipped on an axis. It is tipped on this axis approximately 23.5 degrees from vertical. The Earth rotates once in 24 hours. It does this at a rate of 1609.344 kilometres per hour.

Where we live on the Earth, there are four seasons. They are spring, summer, autumn, and winter. The least warm recorded temperature is -89.4 degrees celsius. The warmest recorded temperature was 56.7 degrees celsius.

The Earth's atmosphere is made many different gases. The Earth is 78% nitrogen, 21% oxygen, 0.003% carbon dioxide (This increases due to pollution), and other gases such as neon, methane, krypton, and hydrogen.

The Earth is the third planet from the Sun. The minimum distance is 146 million kilometres. The maximum is 152 million kilometres. The mean of this amount is exactly one AU.

The Earth was discovered aproximately 3 million years ago by the first human. I think that they just looked down.

The moon is the brightest object in the sky besides the Sun. The moon orbits around the Earth once a month.

(Each of the four lines symbolizes one of the four elements.)

Above you can see the symbol that stands for Earth. You can use this during Ms. D's class instead of writing the word Earth.

The Earth does not and probably never had rings.

Interesting Facts:

• The Earth is the densest major body in our solar system
• The Atmosphere of Earth extends about 10,000 kilometres
• Molten iron core makes a magnetic field
• Actually takes 23 hours and 56 minutes to rotate
• One Earth year is actually 365.2564 days. NOT 365
• The Extra 0.2564 causes leap years to occur

So that was my presentation on Earth. Here is a video that might tell you a bit more about the Earth:
http://www.youtube.com/watch?v=1V2J0oBj42Y&feature=relmfu

Science Class on March 15

Hi everyone!
In today’s class we did two main things. We talked about Japan and the Earth.
First Miss D. checked our moon homework.
Than she explained to us what happened in Japan in the last few days.
The picture on the right side shows some of the houses that collapsed because of the earthquake and the tsunami in Japan.
The other problem in Japan at the moment are the nuclear reactors which explode. Click here to see how nuclear reactor #3 explodes. It is pretty scary.


After we finished talking about Japan we went on to our actual topic, the Earth. The symbol of the Earth is a circle with a cross in the middle as you can see it on the left side. (If you can't see it click on it and it will become bigger). The four parts stand for the four elements.
Rotation: The Earth spinning around its own exes.
The Earths rotation takes 23 hours and 59 minutes. This happens counterclockwise.
Revolution: The Earth traveling around the Sun.
This process takes 365 1/4 days =365 days and 5 hours.
You can prove that a year is 365 1/4 days long, because of the Lap year every 4 years when 4 times 1/4 day makes one. This is when there is a February 29.
The distance on Earth is measured with longitudes and latitudes.
The prime meridian is at 0 degrees longitude.
The equator is at 0 degrees latitude.
The other two very important latitude lines are tropic of cancer, tropic of Capricorn. Tropic of Cancer is located at 23.5° N and the Tropic of Capricorn is located at 23.5° S.

This webpage gives you very interesting scientific facts about the Earth.
Here are some interesting facts about the Earth.

We didn't have homework, but you can still check out Moodle.

I hope you liked it.
The next scribe is Gio.