In the lonosphere, the collision that raises the energy levels of oxygen and nitrogen occurs between which of the
following? Select all that apply.
gas atoms
electrons
protons
neutrons

What evidence supports the law of conservation of energy? a) mechanical energy is converted to chemical energy during photosynthesis. b) oxygen is made from the breakdown of carbon dioxide during photosynthesis. c)energy is absorbed by chlorophyll and becomes chemical energy during photosynthesis. d)the sun gives off light energy that is absorbed by plants.

What substance is the most acidic. lemon juice. tomato juice. sodium hydroxide. water

What is it called when part of a cell membrane closes around a molecule to allow the molecule to enter the cell? a. passive transport b. diffusion c. endocytosis d. exocytosisc. endocytosis