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# 10.29 D4 Phase Changes Ktm Demo

## on Oct 29, 2008

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Explaining the linked concepts of phase changes and kinetic theory of matter.

Explaining the linked concepts of phase changes and kinetic theory of matter.

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## 10.29 D4 Phase Changes Ktm DemoPresentation Transcript

• Day 4: October 29/30
• Objective: SWBAT link kinetic theory of matter to changes of state.
• Homework: finish vocab flap-book; page 39 summary
• Warm up: How long would it take to count 1 billion one-dollar bills?
• Agenda
• Return quizzes
• Share homework ideas
• Demonstrations - evidence of KTM
• Phase changes
• Phase change independent practice instructions
• Phase change IP work-time
• Notebook check on second to last page
• Flap door next to other notebook check
• Quiz onto page 33
• Half hamburger fold
• Glue on line printed on the back!
• Demonstrations
• What is plasma?
• Lightening
• Plasma novelty light
• Hear the KTM
• Bouncy balls in the water jug
• The more energy, the more the molecules bounces around
• Never silent because they’re always moving
• Diffusion
• food coloring in hot water v. cold water
• Expansion
• Gas – balloon in flask
• Solid – ball through ring
• Solids – bi-metallic strip bending
• Prior Knowledge
• What are phase changes?
• What are phase changes that we know?
• Onto the notes
• Matter changes from one state to another as it gains more energy – usually in the form of heat
• What happens to the particles in something when there is more energy?
• The phase change triangle
• Skip four lines from bottom of last thing written on page 39
• Measure 3 cm to right of black line on page. Mark point.
• Draw a vertical line 5 cm long from marked point (8 lines on the paper)
• Draw the sides of the triangle 5 cm long. They will touch at the printed line on the paper if drawn right
• The phase change triangle
• Label this diagram “Illustrating how changes in energy affect the state of matter”
• Make a legend to the right side of the triangle. Two colors, one “hot” and one “cool”
•  Endothermic
•  Exothermic
• Gas Liquid Solid Endothermic Exothermic Low Energy High Energy Melting Freezing Sublimation Evaporation Condensation
• Phase change vocab flaps
• This will be pasted on bottom of 38
• Take sheet of notebook paper
• Fold in half hot dog style
• Fold hamburger style.
• Repeat step 4.
• Fold hot dog style.
• On one side, cut each fold line halfway to make flaps down the page
WORD DEFINITION
• Phase change flipper
• Phase Change
• Endothermic
• Exothermic
• Evaporation
• Condensation
• Melting
• Freezing
• Sublimation
• Make your own definitions using the diagram and info presented in class
• Example:: Melting –energy is added to the substance as it changes from solid to liquid