SCIENCE
EARTH SCIENCE
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
They brought water to Earth, which makes up the interior.
|
|
|
They are planets just like Earth.
|
|
|
They are pieces that broke off of Earth in its early history.
|
|
|
They formed from the same cloud of dust and gas as Earth, so they should have the same composition.
|
Detailed explanation-1: -It is much easier to measure all of the elements in a meteor than in the Earth due to size and complexity, so we can base our estimates of what Earth is made out of based on what we find in meteorites.
Detailed explanation-2: -Why do we use meteorites if they hit the Earth after its formation? Short answer: because the meteorites formed together with the Earth and the rest of the Solar System. Long answer: The Earth formed together with the rest of the Solar System and its meteorites around 4.5 billion years ago.
Detailed explanation-3: -Meteorite craters are more common on the Moon and Mars and on other planets and their natural satellites than on Earth, because most meteors either burn up in Earth’s atmosphere before reaching its surface or in some cases erosion soon obscures the impact site.
Detailed explanation-4: -Some meteorites contain grains of dust (“stardust”) that were produced by stars before the formation of our Solar System. Studies of these presolar grains can increase our understanding of star formation and evolution.