Welcome to Week 7 of Year 7 Chemistry! This week, we’ll investigate the three states of matter, solids, liquids, and gases and explore how substances change between these states. Through hands-on experiments, you’ll see these changes in action and understand the science behind them.
Hour 1: The Properties of Solids, Liquids, and Gases
Learning Objectives
By the end of this hour, you will:
Understand the characteristics of solids, liquids, and gases.
Describe the arrangement and movement of particles in each state.
Read and Watch
Read : the presentation.
Read: page 14-16 in "What's Chemistry all About?".
Watch: What's Matter (SciShow).
Watch: Particles of Your World (SciShow).
Task: Compare States of Matter
Create a table with three columns labelled "Solids," "Liquids," and "Gases."
List the properties of each state (e.g., shape, volume, particle movement).
Use examples from everyday life to illustrate each state.
Hour 2: Changing States of Matter
Learning Objectives
By the end of this hour, you will:
Explain the processes of melting, freezing, boiling, condensation, and sublimation.
Understand how temperature affects particle energy and state changes.
Practical Activity: Observing State Changes
What You Need:
Ice cubes
A kettle or pot for boiling water
A clear glass or jar
A small plate
Steps:
Place ice cubes on a plate and observe as they melt into water (melting).
Heat the water in a kettle or pot until it boils. Observe the steam (boiling).
Hold a clear glass or jar above the steam to collect condensation droplets (condensation).
Reflection Questions:
What caused the ice to melt? How did the water change when it boiled?
How does condensation form on the glass or jar?
Can you think of real-life examples of each state change?
Watch: Matter The Process of Changing State by NG Science and see if you can answer the quiz questions.
Hour 3: Robert Boyle and the Properties of Gases
Learning Objectives
By the end of this hour, you will:
Learn about Robert Boyle’s contributions to our understanding of gases.
Explore how pressure and volume affect gases.
Read and Watch
Read: A biography of Robert Boyle in "100 Scientists who Shaped the World" page 22.
Watch: Boyle’s Law Explained (SciGuys) to see the relationship between pressure and volume.
Task: Experimenting with Gases
What You Need:
A balloon
A plastic syringe (without a needle)
Steps:
Inflate the balloon slightly and tie it off. Observe how the air inside gives it shape.
Use the syringe to pull in air and then push it out. Observe how the air behaves under pressure.
Reflection Questions:
How does the balloon’s shape demonstrate the properties of gases?
What happens to the air in the syringe when you apply pressure?
How does this connect to Boyle’s Law?
Summary and Reflection
Reflect on the Week:
What did you learn about the differences between solids, liquids, and gases?
How do state changes occur in everyday life?
How do Boyle’s discoveries help us understand gases?
Looking Ahead: Next week, we’ll explore the universe and its chemistry, including how elements are formed in stars. Get ready for a cosmic journey!
Good job on finishing week 7!
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