1.
The total amount of matter inside an object.
2.
The starting substances mixed together before a chemical reaction occurs.
3.
The new substances formed after a chemical reaction takes place.
4.
Kept or saved the exact same, with nothing created or destroyed.
5.
System: A sealed container where matter cannot enter or leave.
6.
System: An unsealed container where gas or matter can enter or escape into the surrounding air.
7.
The tiny basic building block that makes up all matter. Rearrange: To break apart chemical bonds and rebuild atoms into new substances.
8.
Bond: The connection holding atoms together. Evidence: Observable clues or proof, such as gas production, color changes, or scale measurements.
9.
To change form or state without destroying the original parts.
