Cooking changes things

This task is about physical and chemical changes.
illustration: stove top with kettle and pot
Cooking can change food and drinks.
A physical change is reversible and no new substance is made. A chemical change is not reversible and a new substance is made.

Question 1Change answer

Below are some changes that can happen during cooking.
Classify each as a chemical or physical change.  
a) Breaking eggs: chemical changephysical change
 
b) Hard boiling an egg: chemical changephysical change
 
c) Melting butter: chemical changephysical change
 
d) Stirring milk into hot coffee: chemical changephysical change
 
e) Baking biscuits: chemical changephysical change