Definitions
What is a physical change?
a change where new substances are not formed, only the state or appearance changes
Does a physical change form a new substance?
No
Is breaking glass a chemical or physical change?
Physical
Give one example of a physical change at home
Melting ice in a drink
What is a chemical change?
a change where one or more new substances are created
Do chemical changes usually involve a large or small energy change?
Large
Is rusting iron a physical or chemical change
Chemical
Give one example of a chemical change at home
Cooking an egg
What does it mean if a change is reversible?
can be undone or reversed
What happens to atoms in a chemical reaction?
Atoms are rearranged, bonds are broken and formed
Is digesting food a chemical or physical change
Chemical
Why are chemical changes important when it comes to cooking food?
Kills bacteria, makes food edible and safe to eat