say for example, the color of our blood inside the body is blue, when you have a cut, th he blood color is red through oxygenation.
4.There are three positively charged proton in the nucleus
6. A physical substance occur in A and a chemical change occur in B
8. dont know what you talking about.sorry
9. Independent variable
This is an answer I can come up with.
Option (d) is the correct answer.
A change that does not bring any difference in chemical composition of a substance is known as a physical change.
For example, shape, size, density, mass etc are all physical changes.
Change in color is not necessarily a physical change because sometimes color of a substance changes due to chemical reaction.
For example, during rusting color of iron changes.
Whereas a change that brings difference in chemical composition of a substance is known as a chemical change.
For example, reactivity, release or absorption of energy, toxicity etc are all chemical changes.
Thus, we can conclude that the statement substance changed shape was a physical change.
i think it is d. e because the next one is igneous.
the atomic mass is the bottom number on the element.