What are Chemical Changes?

Question 1

molecule

Answer 1

two or more atoms bond together and make a new substance

Question 2

chemical change

Answer 2

a change that changes the composition of the substance

Question 3

chemical change examples

Answer 3

• the cooking of an egg
• rusting
• burning
• cooking, baking, browning
• decomposition and rotting
• digestion

Question 4

chemical change…

Answer 4

• after the change a new substance has been produced

- chemical change cannot be reversed by physical means