1. Chemical Changes Lesson 1 What is a chemical reaction?
Learning Objectives
04 December 2018
Chemical Changes Lesson 1 What is a chemical reaction?
Learning Intentions
Define “chemical reaction”
Give examples of everyday chemical reactions
How do we know when a chemical reaction has taken place?
Key Words –
State
Reactants
Products
5 Minute Task

2. What is a chemical reaction?
Think, pair, share Think quietly then discuss with your neighbour what you think a chemical reaction is. Be prepared to share your answer Class Ideas

3. Why do we have these guidelines do you think?
Copy this down!
“ a chemical reaction occurs when two or more chemicals join together to form a new substance”
Why do we have these guidelines do you think?

4. Everyday Chemical Reactions
Think, pair, share
Can you think of any chemical reactions that you have come across in your everyday life?
Be prepared to share your answer
Class ideas

5. Why do we have safety guidelines?
Experiment
Title:
Investigating Chemical Reactions
Aim: To find out how we know a chemical reaction has taken place
Method: See work cards
Results: Write a sentence explaining what happened in each experiment. We added and . Our evidence that a chemical reaction took place is: . The new chemicals produced were
Why do we have safety guidelines?

6. Results Experiment Observations Experiment 1 Sodium Hydroxide +
Hydrochloric Acid
Experiment 2
Sodium Bicarbonate
Acetic Acid
Experiment 3
Silver nitrate
Sodium chloride

7. Conclusion
If you add two ________ together sometimes you get a chemical reaction. This is when a ___ ________ is made.
It is very difficult to ______ the reaction and get the ______ substances back.
Signs that a chemical reaction has taken place include ___________________________
_______________________________________

8. How did it go? Define “chemical reaction”
Give examples of everyday chemical reactions
How do we know when a chemical reaction has taken place?

9.     x x  x x  x x x   Adding acid to alkali Fireworks
Driving a car   
Ice cream
melting
Boiling the kettle
frying an egg  x x
Dissolving sugar
in tea
Burning a candle
Melting
candle wax  x x
Lighting a match
Making
ice cubes
Ironing
clothes  x x
Printing
Baking a cake
Launching
a space
rocket x  