NEW SCIENCE Flashcards for Section 5: Chemical & Physical Changes and Conservation of Mass (SUMMER EXAM)
1
Q
What is a physical change?
A
A change where no new substances are formed and it is reversible.
2
Q
What is a chemical change?
A
A reaction where one or more new substances are formed and it is irreversible.
3
Q
What does the law of conservation of mass state?
A
Atoms are not lost or gained in a chemical reaction; mass of reactants equals mass of products.
4
Q
Give an example of a chemical change.
A
Burning
