A heater letting of heat is an example of release of energy. Please comment if you have any questions about my answer.<span />
When you drop iodine on a leaf you may observe a colour change of orange/brown to a blue/black complex.
This is because in the leaf there are starch molecules that form a blue/black complex with the starch molecules.
hope that helps :)
It's known as the greenhouse effect.
Answer:
where is the drawing? I can't help if I can't see it sorry
Explanation:
Mg + <u>2</u>HNO2 → Mg(NO2)2 + H2
