Chemistry – Lesson 1 (5.1)

Question 1

state 3 clues that tell us chemical change has occrued

Answer 1

1. A new colour change
2. Heat or light given off
3. A soild matrial forms liquid

Question 2

is baking a cake Physical or chemical change

Answer 2

Chemical change

Question 3

this number represents the sum of rpotons and neutrons in an atom

Answer 3

atomic mass

Question 4

an example of chemical property

Answer 4

corrsion

Question 5

3 examplaes of physical change

Answer 5

1. evaportion
2. condensation
3. dissloving

Question 6

physical property exmalples

Answer 6

melting and point malleability = bend