Molecular Motion Teacher Guide Molecular Motion Teacher Guide
Standard: PS.6.1.2 Thermal Energy and Particle Motion
LEARNING OBJECTIVES
Explain how thermal energy affects the kinetic energy (speed) of particles.
Describe the arrangement and motion of particles in solids, liquids, and gases.
Model how phase changes occur when energy is added or removed.
MATERIALS NEEDED
Particle Power Doodle Notes
Slide Decks (Day 1 & 2)
Particle Party Role-Play Cards
Exit Tickets
DAY 1: THE ENERGY JIVE (40 MIN)
0-5 min
The "Frozen" Hook:
Ask students: "Why does an ice cube disappear on a hot sidewalk?" Discuss the idea of "invisible" movement and heat as energy.
5-20 min
Direct Instruction:
Use Day 1 Slides to introduce Kinetic Molecular Theory. Focus on the "Speed-Space-Scale": as energy increases, speed increases, and space increases.
20-35 min
Doodle Notes:
Students complete the "Particle Power" sheet. Encourage using different colors for hot (orange/red) and cold (blue) energy levels.
35-40 min
Wrap Up:
Quick check: "Show me with your hands how gas particles move compared to solid particles."
DAY 2: PHASE SHIFT (40 MIN)
0-5 min
Review:
Quick recap of the Speed-Space relationship from Day 1.
5-15 min
Phase Change Logic:
Use Day 2 Slides to explain melting, freezing, evaporation, and condensation as energy transfers.
15-35 min
Group Activity: Particle Party:
Kinesthetic modeling activity. Students act as molecules. Use the "Particle Party" prompt cards to guide their movement at different "energy levels" (Music tempo can be used to simulate heat).
35-40 min
Exit Ticket:
Assess understanding of the relationship between thermal energy and phase change.
Instructional Strategies & Tips
Misconception Alert: "Cold" is a thing.
Students often think "cold" is something that is added to a system. Remind them that cold is simply the absence or removal of thermal energy. We only measure the motion (Kinetic Energy) that is there.
Differentiation Strategies
For Struggling Learners:
Use the "Hand Vibration" analogy. Solid = high-fiving neighbors while staying in place. Liquid = walking around while keeping one hand on a wall. Gas = running freely.
For Advanced Learners:
Challenge them to explain why the temperature doesn't rise during the actual phase change (latent heat). They can research why energy goes into "breaking bonds" instead of speed.
Group Activity: Particle Party Setup
Clear a space in the classroom. Assign students roles using the Particle Party Cards. Use a playlist of songs with different BPM (Beats Per Minute) to represent Thermal Energy:
Slow/Quiet Music: Students huddle close and vibrate (Solid).Medium Music: Students move past each other but stay within a boundary (Liquid).Fast/Upbeat Music: Students move rapidly across the entire room (Gas). Energy Jive Slides The Energy Jive
Thermal Energy & Particle Motion
Day 1: Kinetic Molecular Theory
The Disappearing Act
Imagine an ice cube sitting on a hot sidewalk in July.
Where does it go?
What is happening to the tiny "pieces" of the water that we can't see?
The Big Idea
Thermal Energy
The total energy of all the particles in an object.
Kinetic Theory
Everything is made of tiny particles that are always moving.
The Speed-Space Rule
Add Energy
Faster
Particles move more
Particles Spread
Farther
Space between increases
"The hotter the faster, the faster the farther!"
Particle Personalities
Solid
Vibrating in place.
Liquid
Sliding past each other.
Gas
Moving rapidly.
Particle Power Doodle Notes Particle Power
Thermal Energy & Motion • Doodle Notes
Name: ____________________
Date: ____________________
Wait... what is it?
Thermal Energy
Write the definition in your own words...
The Golden Rule
As Thermal Energy INCREASES:
1
Kinetic Energy (Speed)
2
Distance (Space)
Absolute Zero
The temperature where all particle motion _____________.
Hypothetically Speaking!
Draw the Molecules!
Solid
Movement Style:
Energy Level:
[ ] Low [ ] Med [ ] High
Liquid
Movement Style:
Energy Level:
[ ] Low [ ] Med [ ] High
Gas
Movement Style:
Energy Level:
[ ] Low [ ] Med [ ] High
Adding Energy makes particles...
&
Particle Power Answer Key Particle Power KEY
Teacher Reference • Answer Key
Thermal Energy
The total kinetic and potential energy of all the particles in a substance.
As Thermal Energy Increases:
1
Kinetic Energy (Speed)
INCREASES / FASTER
2
Distance (Space)
INCREASES / FARTHER
Absolute Zero
STOPS / CEASES
Movement Style:
Vibrating in fixed position
Energy Level: [X] Low
Movement Style:
Sliding past one another
Energy Level: [X] Med
Movement Style:
Moving rapidly/randomly
Energy Level: [X] High
Adding Energy makes particles...
MOVE FASTER & SPREAD APART
Phase Shift Slides Phase Shift
When Particles Change Their Ways
Day 2: Phase Changes
The Middle Ground
Phase Change
"The transition from one state of matter to another."
During a phase change, the particles don't change what they are. They only change how they act.
🧊
💧
♨️
🌨️
Melting
Energy is ADDED
Particles move FASTER
Solid becomes Liquid.
Freezing
Energy is REMOVED
Particles move SLOWER
Liquid becomes Solid.
The Vapor Cycle
♨️
Evaporation
Liquid to Gas
Particles fly apart!
💧
Condensation
Gas to Liquid
Particles huddle back!
Particle Party!
It's time to act out the molecules.
Listen to the Beat
Follow your Team
Particle Party Activity Cards Particle Party
Group Kinesthetic Activity Cards
HOW TO PLAY
1. Setup
Clear a large area. Divide students into groups of 4-6. Each group represents a "cluster" of molecules.
2. Thermal Energy
The teacher acts as the Heat Source . Use music or claps to set the "temperature" (speed).
3. Phase Shifts
Announce a phase (e.g., "Melt!"). Groups must transition their movement to match the new state.
The Solid Huddle
State: Solid
Stand shoulder-to-shoulder with your group.
Motion: Vibrate slightly but do not move your feet.Bonding: Hold hands or link elbows tightly.
The Liquid Flow
State: Liquid
Loosen your grip. Stay within arms reach of your group.
Motion: Walk slowly and slide past your teammates.Bonding: Keep one hand touching someone at all times.
The Gas Blast
State: Gas
Break all contact with your group.
Motion: Move rapidly in straight lines across the room.Interaction: "Bounce" off walls or other groups gently.
The Shift!
Teacher Prompts
"MELT!" - Solid groups must start sliding but stay close.
"BOIL!" - Liquid groups must break apart and run!
"FREEZE!" - Moving groups must huddle and vibrate.
"CONDENSE!" - Gas molecules must slow down and touch.
Phase Shift Exit Ticket Phase Shift
Exit Ticket • Science 6
🎟️
Name
Date
1 When an ice cube melts into liquid water, what is happening to the speed of the particles?
They slow down
They speed up
2 Describe the spacing of particles in a gas compared to a solid.
3 Thermal energy is removed from a beaker of liquid water. What phase change will likely occur?
Evaporation
Freezing
