Answer:
I would say to keep the oxygen we breathe in or to filter out the bed uv rays from the sun like radiation.
Explanation:
im guessing
True
These are all indicators of a chemical change.
If you can have more than 1 answer then the dependent variable is graphed on the Y-axis and and is usually used for comparison since they are usually the experiment results. If you can only have one answer then the dependent variable is graphed on the y-axis.
Answer:
X = Water (H2O) ; Y = Hydrogen ; Z = Oxygen
Explanation:
2(H2O) -------> 2H2 + O2