A) They trap the suns heat to warm up the earth, like a real greenhouse
A positive control is when you test your experiment against something where you know what the effects will be, whereas a negative control would be when you test the experiment with something you know will have no effect.
I think it should be d because you can't measure gas and its mass but you do you man
The reticular connective. I'm not going to lie, I learned that from NBC Hannibal and I fact checked it and it is correct! XD
