Answer:
I'm not a genius but it's an invisible force that pulld object towards eachother, Earth's gravity is what keeps you on the ground and what makes things fall, Anything with mass also has gravity, objects with more mass means they have more gravity
All of the the answers are are correct but a fume hood is more for if you are dealing with chemicals that can produce fumes the are deadly to people
They depend on nitrogen-fixing bacteria, which convert atmospheric nitrogen into a usable form.
Birds and bees. Adam and Eve
I think it is called condensated matter