Answer:
nuclear fusion
Explanation:
When the density and temperature at the core of the gravitationally collapsing nebula reaches values when nuclear fusion is triggered and sustained, that marks the birth of the star.
Chopping down trees hurts the environment
1. Chemical sedimentary rocks
2. Chemical sedimentary rocks are formed from sediments created by rocks being broken down into small particles (clasts).
3. Chemical sedimentary rocks are formed from sediments created by dissolved chemicals being precipitated out of the water they're dissolved in.
Answer:
human water has to be filtered and cleaned because it contained many chemical and bacteria animal water can be filtered but anilmals will drink out of a slightly dirty container since they have stronger immune systems
Explanation:
