• Hot plate or portable burner (teacher use only)
• Large clear pot with lid
• Ice cubes
• Thermometer
• Mirror or cold metal surface
• Safety goggles
• Observation recording sheets
• States of matter vocabulary cards
• Material state prediction cards
• Individual ziplock bags with small ice cubes for students

Set up demonstration station where all students can safely observe. Prepare observation recording sheets with sections for each state of matter and transition. Create vocabulary cards for key terms (solid, liquid, gas, melting, freezing, evaporation, condensation). Practice demonstration to ensure timing works well.

1. Safety and procedure introduction (5 minutes):
2. Review safety rules for science demonstrations
3. Explain the purpose: observing how matter changes from one state to another
4. Distribute and explain observation recording sheets
2. Prior knowledge activation (5 minutes):
3. Quick review of three states of matter using examples
4. Students share everyday examples of matter changing states
5. Introduce vocabulary for state transitions
3. Prediction activity (3-5 minutes):
4. Show students the ice cubes and ask: 'What will happen to this ice if I put it in a pot and heat it?'
5. Students record predictions on their sheets
6. Follow-up: 'What will happen if I keep heating the water? What will happen to the steam if it touches a cold surface?'
4. Teacher demonstration - Melting (5-7 minutes):
5. Place ice in clear pot and begin heating
6. Narrate observations as ice begins to melt
7. Have students record observations and draw what they see
8. Measure and announce temperature at key transition points
9. Reinforce vocabulary: solid to liquid, melting
5. Teacher demonstration - Evaporation (5-7 minutes):
6. Continue heating water until it boils
7. Safely show steam rising (ensuring students maintain safe distance)
8. Discuss water molecules moving into the air
9. Students record observations and temperature data
10. Reinforce vocabulary: liquid to gas, evaporation, boiling
6. Teacher demonstration - Condensation (3-5 minutes):
7. Hold cold mirror above (not too close) to the steam
8. Show water droplets forming on cool surface
9. Discuss water vapor changing back to liquid
10. Students complete observation records
11. Reinforce vocabulary: gas to liquid, condensation
7. Student hands-on activity (10 minutes):
8. Distribute ziplock bags with small ice cubes
9. Students hold bags in their hands and observe melting
10. Record observations of this state change
11. Draw before and after diagrams
8. Concept connection and review (5-7 minutes):
9. Create a class diagram of the water cycle connecting to observed state changes
10. Students complete state change vocabulary matching activity
11. Discuss everyday examples of these state changes

For younger students, focus on observations and simple vocabulary, reducing the data recording. For kinesthetic learners, add role-play activity where students act as water molecules in different states. For advanced students, add quantitative temperature monitoring and graphing.

Review observation sheets for accuracy and detail. Use exit tickets where students identify state changes in new scenarios. During discussion, note students' use of correct vocabulary and understanding of molecular behavior.