#660 Is Earth an open or closed system?
Watch this on YouTube Is Earth an open or closed system? It is both. For some things it is open and for others, it is closed. Earth is an open…
Watch this on YouTube Is Earth an open or closed system? It is both. For some things it is open and for others, it is closed. Earth is an open…
I learned this today. Our bodies make energy from food by breaking it down and converting the chemical energy that is stored in it. Our bodies need energy to move…