Chemical and Physical Changes- Year 10 Science

Slides will help junior science students to differentiate chemical and physical changes in chemistry

1. 1.Chemical Vs Physical Change

2. Learning Objective To distinguish between a physical and chemical change by reversing a physical change

3. Lab Class Write todays date and write the topic- Physical and Chemical Change Lab Stick lab instructions in your book. Draw up a table 4 columns and 3 rows

4. What does it look like before the experiment? What does it look like during the experiment? What does it look like after the experiment? Salt + water Magnesium + HCl Your table should look like this

5. Copy this question in your book and answer them. One of the reactions you did today is a PHYSICAL change - meaning that it is reversible. The other reaction is a CHEMICAL change - meaning it is NOT reversible. 1. Explain which of the experiments you think is reversible and why.

6. 1. Chemical Change A chemical change occurs when a new substance is formed.

7. Signs of a Chemical Change A gas have been given off There is a colour change There is a different smell Heat given out or absorbed Change cannot be easily reversed.

8. Physical Change Is not a permanent change A physical change is a change in matter that alters its form but not its chemical identity. The size or shape of matter often changes, but there is no chemical reaction

9. Class Activity Complete Scipad page 8 and 9 And Do the Scipad online “ Nature of atoms”- Chemical Change Vs Physical Change Atoms Elements