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Max Weck

on 17 December 2013

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Transcript of Asteroids!!!!!!

The Most Common Theory
The most common theories has happened about how water came to Earth. For example, there are a lot of asteroids that hit the Earth. Scientist say that in the form of the Earth has a lot of asteroids and comets nearby,some of them has hit the earth and inside there was water that how a lot of scientist think water came to earth.
Where do Asteroids mostly come from?
The scientist found a lot of different minerals in asteroids, such as golds, platinum, iridium, palladium, etc. There are hundreds of minerals discovered in asteroids every year
Asteroids worth a lot of money because there are minerals and water in there which are worth $200 billion dollar so if you find a asteroid you should bring it to a lab so that you could get money so for example these minerals are not so common on earth.If you find 3 asteroids you could get like $300 billion dollars because the asteroids weren't so big but every small asteroid could be worth a lot more,because it could have a new mineral in it
By Max Weck & Kevin Wang
Research shows that asteroids came from mostly Mars and Jupiter which means these planets where still in a kind of formation and parts feel of.That would mean there is water in Mars and Jupiter.Right now There are still pieces of the planets in space that's why asteroids still hit Earth.But there are still pieces from other planets!
Kinds of Minerals In Asteroids
Why Asteroids are worth a lot
On Feb. 15, 2013, a small asteroid entered Earth's atmosphere over Chelyabinsk, Russia, and startled onlookers with its fiery appearance and shockingly loud noise. NASA estimates the asteroid was approximately 17 meters in diameter with a mass of approximately 11,000 metric tons and traveled approximately 18 kilometers per second. Infra sound stations nearby and as far away as Antarctica detected the low-frequency sound waves generated by the meteor. The infra sound data indicates that the event, from atmospheric entry to the meteor's airborne disintegration took 32.5 seconds. The entry angle to horizontal was about 15° and the terminal part of the fireball was at about 20 km altitude.
Real Text about asteroids
The Biggest Asteroid ever
The largest asteroid ever to hit Earth was probably Theia, a Mars-sized body that formed over 4 billion years ago, during the early days of the solar system. Theia formed in a Lagrange point, a gravitationally stable region in the Earth's orbit, located on the opposite side of the Sun. Eventually, orbital fluctuations caused this body to oscillate closer and closer to the Earth, and eventually, they collided, throwing up a greater volume of molten rock than all the present-day continents combined. Some of this molten rock was ejected so forcefully that it entered orbit, aggregated, cooled, and became the Moon. This scenario is called Giant Impact Theory, and it accurately explains most features of the Earth-Moon system, such as why the chemical composition of the Moon is similar to that of the Earth's crust.

Since Theia, the largest asteroids known to impact the Earth were much smaller, maxing out at around 6 miles (about 10 km) in size. Larger ones may have hit the Earth during the period called the Late Heavy Bombardment, which occurred between 4.1 and 3.8 billion years ago, but because most of the crust from this period has either been subducted back into the mantle or covered in layers of sediment and volcanic rock, the craters may be hidden.
The largest verified crater on the Earth today is the Vredefort crater in South Africa, also known as the Vredefort Dome or the Vredefort impact structure. The crater is more than 186 miles (about 300 km) across, about twice the size of the Chicxulub crater, left behind by the asteroid that exterminated the dinosaurs. The Vredefort crater is thought to have been made by the largest impact besides the one that created the Moon — strictly speaking, Theia was a planetoid rather than an asteroid — about 6 miles (10 km) in size.

The Wilkes Land anomaly, a concentration of mass under the Wilkes Land ice cap in Antarctica, may indicate an even larger impact structure, but its nature is uncertain.
1. What is the straight-line distance the meteor traveled through Earth's atmosphere?

2. Compute the volume of the asteroid, assuming it was nearly spherical.

3. Compute the density of the asteroid. What does this tell you about the physical composition of the asteroid? Is it primarily ice? Rock? Iron?

4. How much energy was released by the event?

5. At what altitude did atmospheric entry occur? What layer of the atmosphere is this?
mostly by max
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