Theroy or hypothesis thats what i think it is
Answer:
B) lighting a match
Explanation:
a chemical change is a chemical reaction involving the rearrangement of atoms. While a physical change can often be reversed, a chemically change typically cannot.
Always remember, if something is being lit on fire then it is a chemical change, since fire breaks the bonds in between the atoms.
Freezing water is a physical change because it can be reversed and does not alter the substance, which is water. a change in state i always a physical change
tearing up a piece of paper is a physical change since nothing on a molecular level has changed. its still paper.
Dissolving sugar in water is a <em>homogenous mixture</em>, meaning that it looks uniform without, however it is still only sugar and water, so it is a physical change.
Explanation:
The correct answer is providing structure, regulating cell processes and creating movement
Electrons<span> are transferred from water to plastiquinone in the presence of light. The cytochrome bf complex catalyzes the transfer of </span>electrons<span> from plastoquinol to plastocyanin.</span>
