Yes I have, an example of a Physical change is when you cut an apple in half and can be reversed with another physical change.
Have you ever wondered about physical change?
What about chemical change?
A chemical change is when two chemicals combine to change the substance it is being applied to. Five signs of a chemical change are, temperature, color, odor, a gas is produced, and production of a solid.
An exothermic reaction is when there is a reaction that releases energy into the environment in a form of heat. One Example is rusting of iron.
Do you know the difference between endothermic and exothermic reactions?
An endothermic reaction is accompanied by the absorption of heat. An example of this is photosynthesis. This is because when the plant is growing it needs to absorbe the sun and water to grow.
What about endothermic reactions?
Did you know that reactions between elements conserve matter?
Yes did but please explain more to me.
Wow! I did not know that. Thank you!
Well, matter can neither be created or destroyed. One example is one iron atom can react with one sulfur atom to give one formula an iron sulfur.