atoms the basic building blocks of matter

diffusion when molecules move from high to low concentration

electron negatively charged particles that orbit the nucleus

elements substance that cannot be broken down and is made of only one atom

endocytosis when substance is taken into cell membrane

exocytosis when substance is taken out of cell membrane

facilitated diffusion when transport proteins move substances in and out

ion electrically charged atoms when their is not an equal amount of protons and neutrons

matter anything that takes up space and has mass

neutron neutrally charged particle

osmosis the diffusion of water through a cell membrane

proton positively charged particle in nucleus that defines an atom