How is nitrogen extracted from air. Describe in brief​

Which of the following mining methods disrupts the sea floor?

When you mate two plants together the terms is called? answer it fast as possible plz! i have a test tomorrow!

Which of the following observations indicates that there is a small, dense, positively charged part in the center of an atom? some uncharged particles are scattered by a gold foil. all uncharged particles are attracted towards a gold foil. all positively charged particles pass straight through a gold foil. some positively charged particles bounce back from a gold foil.