The early precambrian atmosphere consisted primarily of nitrogen and carbon dioxide with almost no oxygen.
<span>Today, the atmosphere contains about 20% oxygen, less carbon dioxide and similar amounts of nitrogen. </span>
<span>Photosynthetic green-leaf plants and trees are largely responsible for the change, converting carbon dioxide to oxygen.</span>
Metal pots are good for cooking because they have heat conductivity.
So really you only need to answer the first one because you have more than enough og everything. 2×(what)=14 then that will be your answer
H+O>h2o I believe this is the answer
Answer: J
Explanation: when a object hits something it has a equal and opposite reaction pushing it back
