Molecular Mayhem Teacher Guide Molecular Mayhem
3-Day Teacher Guide
Subject: 6th Grade Science • Standard: PS.6.1.2
Unit Objective
Students will use models to explain the relationship between changes in thermal energy in a substance and the motion of its particles, specifically during phase changes.
Day 1: Speedy Particles
Focus
Kinetic Molecular Theory basics. Connection between temperature (thermal energy) and particle speed.
Agenda (40 min)
00-05: Hook: Food coloring in hot vs. cold water demo.05-20: Direct Instruction (Slides 1-8).20-35: Speedy Particles Doodle Notes.35-40: Exit Ticket: Draw a "hot" vs "cold" gas.
Day 2: Phase Shift
Focus
Phase changes: Melting, Freezing, Vaporization, Condensation. Why energy is needed to break attractions.
Agenda (40 min)
00-05: Warm-up: Why does ice melt on a table?05-20: Direct Instruction (Slides 9-16).20-35: Phase Shift Worksheet (Flowchart focus).35-40: Partner Share: Explain condensation on a soda can.
Day 3: Energy Jumps
Focus
Sublimation, Deposition, and interpreting Heating Curves. Identifying plateaus as phase changes.
Agenda (40 min)
00-05: Mystery: Dry Ice demo (video or live).05-15: Direct Instruction (Slides 17-24).15-35: Heating Curve Challenge Worksheet.35-40: Final Reflection: The "hidden" energy of plateaus.
Teaching Tips
Misconception Alert! Students often think particles themselves grow or shrink. Emphasize that only the *space* and *speed* change.
Kinesthetic Idea Have students stand up and "vibrate" for solids, "shuffle" for liquids, and "run" for gases.
Molecular Mayhem Slides Unit Molecular Mayhem
Thermal Energy & Particle Motion
Unit Overview
Day 1
SPEEDY PARTICLES
How does heat change the way things move?
The Big Idea
Everything is made of Matter.
Matter is made of Particles.
Particles are ALWAYS MOVING.
What is Temperature?
Low Energy
Particles move slowly.
Example: "Cold"
High Energy
Particles move FAST.
Example: "Hot"
Thermal Energy = Total Kinetic Energy!
Day 2
Phase Shift
Breaking the Bonds
The Shift
Melting Solid → Liquid (+ Heat)
Freezing Liquid → Solid (- Heat)
Boiling Liquid → Gas (+++ Heat)
Why do we need energy?
Particles have Attraction (like magnets holding them together).
To change phase, particles must overcome this pull.
ENERGY BREAKS BONDS!
Day 3
Energy Jumps
Heating Curves & Rare Changes
The "Big Jumps"
Sublimation
Solid → GAS
Example: Dry Ice
Deposition
Gas → SOLID
Example: Window Frost
The Heating Curve
Look at the Flat Lines!
During a phase change, temperature stays the same.
The energy is busy breaking bonds, not speeding up particles!
Time →
Temp →
Speedy Particles Doodle Notes Speedy Particles
Molecular Mayhem // Day 1 Doodle Notes
Name: ________________________________
Date: ________________________________
The Golden Rule:
Everything is made of Matter , and all matter is made of Particles that are...
ALWAYS MOVING!
Particle Speed Dial
Draw 3 particles for each. Add "whoosh" lines ( ) to show speed!
Cold
Warm
HOT!
Thermal Energy Definition
Fill in the blanks:
Thermal energy is the ___________ kinetic energy of the ___________ in an object.
Word Bank: Particles, Total, Speed, Matter
Temp = Average
Modeling the Three States
Fill me!
Solid
Vibrate in place
Low Energy
Locked Together
Slide & Flow!
Liquid
Particles slide past
Medium Energy
Take shape of container
Wild & Fast!
Gas
Fly independently
HIGH Energy
Spread out to fill room
CHALLENGE: Color your particles BLUE for low energy and RED for high energy!
Phase Shift Worksheet Phase Shift
Molecular Mayhem // Day 2 Lab Sheet
Name: ________________________________
Date: ________________________________
Part 1: Mapping the Shift
Label the state of matter in the circles and the name of the phase change on the arrows. Draw a red arrow for "Energy Added" and a blue arrow for "Energy Removed".
Phase 1
___________________
___________________
Phase 2
___________________
___________________
Phase 3
Part 2: Molecular Logic
Phase Change Energy (In or Out?) What happens to the particles? Melting Speed up and slide... Freezing Vaporization Condensation
The Particle Detective
You leave a glass of ice water on a table. Tiny drops of water form on the outside of the glass. Using the words ENERGY and PARTICLES , explain why this happened.
Adding Energy
Breaks bonds, creates space!
Removing Energy
Forming attractions, locking together!
Heating Curve Challenge Worksheet Energy Jumps
Molecular Mayhem // Day 3 Challenge
Name: ________________________________
Date: ________________________________
Sublimation
Solid skips the liquid phase and goes straight to gas!
Write an example: ____________________
Deposition
Gas skips the liquid phase and goes straight to solid!
Write an example: ____________________
Part 1: Graph Analysis
1 2 3 4 5
Temperature (°C) →
Time / Energy Added →
1
2
3
4
5
Bank: Solid • Liquid • Gas • Melting • Boiling
Part 2: Cracking the Code
1. Why is the line flat at segments #2 and #4 even though energy is still being added?
2. In which segment are the particles moving the SLOWEST?
3. What would happen to the graph if you removed energy (cooled it down) instead?
