Tiny organisms known as cyanobacteria, or blue-green algae.
Answer is A-photosystem II
This is a combination reaction because two molecules becomes one
A + B ---> AB
The correct answer is Crystals.
Unlike sugar, salt is not made out of crystals, but both salt and sugar are made out of atoms, that is molecules, and can have ions.
Acceleration is when something is being moved forward or back, motion is just movement, friction is two or more things rubbing together, so the answer should be B. gravity
