View Full Version : Amazing Earth Facts

13-02-05, 17:29
Will Earth always be here?

Astronomers know that over the next few billion years, the Sun will swell so large as to envelop Earth. If we're still here, we'll probably fry and the planet will be vaporized. There's a chance, however, that the changing mass of the Sun will cause Earth to move into a more distant and pleasant orbit. One mathematical calculation shows it would be theoretically possible for humans to engineer such a move before it's too late.

On average, how much water is used worldwide each day?

About 400 billion gallons.

Can rocks grow?

Yes, but observing the process is less interesting than watching paint dry. Rocks called iron-manganese crusts grow on mountains under the sea. The crusts precipitate material slowly from seawater, growing about 1 millimeter every million years. Your fingernails grow about the same amount every two weeks

How much space dust falls to Earth each year?

Estimates vary, but the USGS says at least 1,000 million grams, or roughly 1,000 tons of material enters the atmosphere every year and makes its way to Earth’s surface.

How far is it to the center of the Earth?

The distance from the surface of Earth to the center is about 3,963 miles (6,378 kilometers). Much of Earth is fluid. The mostly solid skin of the planet is only 41 miles (66 kilometers) thick -- thinner than the skin of an apple, relatively speaking.

Has the Moon always been so close?

It used to be much closer! A billion years ago, the Moon was in a tighter orbit, taking just 20 days to go around us and make a month. A day on Earth back then was only 18 hours long. The Moon is still moving away -- about 1.6 inches (4 centimeters) a year. Meanwhile, Earth's rotation is slowing down, lengthening our days. In the distant future, a day will be 960 hours long!

Is Earth the largest rocky planet in the solar system?

Just barely! Earth's diameter at the equator is 7,926 miles (12,756 kilometers). Venus is 7,521 miles (12,104 kilometers) wide. Mercury and Mars, the other two inner rocky planets, are much smaller. Pluto is rocky, too, but it's comparatively tiny (and some say it is not a planet at all).

What percentage of the world’s water is in the oceans?

About 97 percent. Oceans make up about two-thirds of Earth's surface, which means that when the next asteroid hits the planet, odds are good it will splash down.

How hot are the planet's innards?

The temperature of Earth increases about 36 degrees Fahrenheit (20 degrees Celsius) for every kilometer (about 0.62 miles) you go down. Near the center, its thought to be at least 7,000 degrees Fahrenheit (3,870 Celsius).

Is Earth's core solid?

The inner portion of the core is thought to be solid. But the outer portion of the core appears molten. We've never been there though, so scientists aren't sure of the exact composition.

What's the deepest place in the ocean?

The greatest known depth is 36,198 feet (6.9 miles or 11 kilometers) at the Mariana Trench, in the Pacific Ocean well south of Japan near the Mariana Islands.

How old is Earth?

Our planet is more than 4.5 billion years old, just a shade younger than the Sun. Recent evidence actually shows that Earth was formed much earlier than previously believed, just 10 million years after the birth of the Sun, a stellar event typically put at 4.6 billion years ago.

How many lightning strikes occur worldwide every second?

On average, about 100. Those are just the ones that hit the ground, though. During any given minute, there are more than a thousand thunderstorms around the Earth causing some 6,000 flashes of lightning. A lot of it goes from cloud-to-cloud

How much would seas rise if the Antarctic Ice Sheet melted?

The Antarctic Ice Sheet holds nearly 90 percent of the world's ice and 70 percent of its fresh water. If the entire ice sheet were to melt, sea level would rise by nearly 220 feet, or the height of a 20-story building. Scientists know there's a melting trend underway. The United Nations has said that in a worst-case scenario -- depending on how much global air temperatures increase -- seas could jump 3 feet (1 meter) by 2100.

How much gold has been discovered worldwide to date?

More than 193,000 metric tons (425 million pounds). If you stuck it all together, it would make a cube-shaped, seven-story structure that might resemble one of Donald Trump's buildings. First you'd have to find all those rings that have gone down the drain.

What percentage of the world’s fresh water is stored as glacial ice?

About 70 percent. And if you had to replace it all, you'd need 60 years of the entire globe's rainfall, and then you'd have to figure out a way to freeze it all.

Mark Garcia
13-02-05, 19:06
Interesting... http://www.tombraiderforums.com/images/smilies/smile.gif

13-02-05, 19:10
Thanks Apofiss http://www.tombraiderforums.com/images/smilies/wave.gif

tlr online
13-02-05, 20:04
I love threads like these. Thanks Apofiss.

13-02-05, 20:17
Kewl http://www.tombraiderforums.com/images/smilies/smile.gif

13-02-05, 20:50
Welcome :cool:

[ 14. February 2005, 17:01: Message edited by: Apofiss ]

13-02-05, 23:45
Why roll your eyes?

Anyway I knew most of that already, but still interesting stuff.

14-02-05, 02:00
Interesting, thanks! http://www.tombraiderforums.com/images/smilies/wave.gif

14-02-05, 13:08
Originally posted by Draco:

Anyway I knew most of that already, but still interesting stuff. I only knew the first fact. :rolleyes:
But the others are news to me. Thanks Apofiss. http://www.tombraiderforums.com/images/smilies/wave.gif

14-02-05, 13:16
This might sound dumb, but will we ever run out of gold? Oil is made from fossils and diamonds from coal (?) and pearls from oysters. Where does gold come from?

Great facts.

14-02-05, 14:59
That's a trick question Liv, because we can't run out of what we don't consume http://www.tombraiderforums.com/images/smilies/tongue.gif

14-02-05, 17:03
Originally posted by Draco:
Why roll your eyes?
What eyes? http://www.tombraiderforums.com/images/smilies/tongue.gif

14-02-05, 23:01
Oh. By trick you really mean stupid. ;)

15-02-05, 00:48
Originally posted by Apofiss:
</font><blockquote>quote:</font><hr />Originally posted by Draco:
Why roll your eyes?
What eyes? http://www.tombraiderforums.com/images/smilies/tongue.gif </font>[/QUOTE]:D

15-02-05, 01:17
Originally posted by andromeda_eats:
Oh. By trick you really mean stupid. ;) Nah, I only mean that when I say it.