Download presentation
Presentation is loading. Please wait.
Published byMalcolm Shields Modified over 5 years ago
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
Similar presentations
© 2024 SlidePlayer.com. Inc.
All rights reserved.