Answer:
Scientists would want to know if it will happen because when an asteroid collides with the Earth it's basically throwing huge rocks from space down to Earth. Another reason is also because scientists want to figure out how to stop this from happening.
Explanation:
With an asteroid hitting the Earth; dust and smoke rising in the atmosphere prevents sunlight from reaching our world and causes the total temperature to drop. This event can lead to the death of many living things. If an asteroid the size of an apartment hits Earth, this blow could possibly destroy a small city.