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Investigation 4 – day 1. Date: 9/2/14 LT: I can compare expansion, contraction, and compression. Sponge: What do you think happens when you heat air in a hot air balloon?. To do…. Agenda Student info sheets/website sheets Welcome to your new class! Classroom rules Drill expectations.
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Investigation 4 – day 1 Date: 9/2/14 LT: I can compare expansion, contraction, and compression. Sponge: What do you think happens when you heat air in a hot air balloon?
To do… Agenda Student info sheets/website sheets Welcome to your new class! Classroom rules Drill expectations
Kinetic Energy—What is it? Copy in index! Kinetic Energy: the energy of motion
Questions to discuss… • Are particles moving? • Do they have kinetic energy? • How would heat affect their movement? Their kinetic energy?
Copy on page 70 • Gas particles have kinetic energy. • Particles are always in motion. • Heat is result of the kinetic energy of particles.
Kinetic Energy Cont… • Kinetic energy happens in things we can’t always see, like a gas (oxygen, water vapor, etc) • 3 ways to increase KE • Increase the mass (make the object bigger) or…. • Increase velocity (object goes faster in a certain direction) or… • Increase temperature (make the object hotter)
Kinetic Energy Cont… • Examples: • What has more KE…a cup of hot coffee or an ice cube? • What has more KE…a speeding car or a stopped car? • Demos • Kinetic energy can be seen in gases, liquids, and solids. Lets look at examples! • You will be completing NB 71 and 73.
Gas Expansion/Contraction Demo • https://www.youtube.com/watch?v=ZPErStqSSMk Be prepared to draw a representation of the lab on page 71 part 3!
NB page 71 and 73 • Part 3: Draw and label the set up from the video!
Kinetic Energy Discussion… What happens to the air particles when you heat them? • Move faster or slower? • Move closer together or farther apart? • Do the particles themselves get bigger or stay the same? What happens to the air particles when the heat source was removed (cooled)? • Move faster or slower? • Move closer together or farther apart? • Do the particles themselves get bigger or stay the same?
Gas Expansion/Contraction: notes on page 70 • During expansion (air heated), particles DO NOT increase in size – the space in between the particles increases!!! • During contraction (heat removed), particles DO NOT decrease in size – the space in between the particles decreases!!!
NB page 71 Answer Part 4: describe what happens to the balloon.
NB page 73 • Use your notes to explain Part 5: explain what happens to the PARTICLES inside the balloon!
AP: Copy kinetic definitions in index! • Compression: The decrease of gas volume as a result of applied force (volume gets smaller because pushed upon). • Contraction: The decrease of volume due to decreased kinetic energy of particles (volume gets smaller because heat removed). • Expansion: The increase of volume due to increased kinetic energy of particles (volume gets bigger because heated up).
Comp: Copy kinetic definitions in index! • Compression: The decrease of gas volume, volume gets smaller because pushed upon • Contraction: The decrease of volume due to decreased KE, volume gets smaller because cooled! • Expansion: The increase of volume due to increased KE, volume gets bigger because heated!
Gas Mini-Assessments: I can compare expansion, contraction, and compression. Complete the gas mini-assessment. You may use your notes!
Investigation 4 – day 2 Date: 9/3/14 LT: I can explain the effect of heating and cooling on gas, liquid, and solid particles. Sponge: When heated, a gas ______. When cooled, a gas _______. Choose expands or contracts for each!
To do… Check HW Collect student info sheets/website sheets Today is worth 100 points participation – every time I redirect you, you lose 10 points!
Review…. • What is KE? • When heated, how do particles change? • When cooled, how do particles change?
Turn to page 75: Read directions • Fill out letter E…. COLD WATER_____ HOT WATER_____ R= resting level C= cold water level H= hot water level WE ARE STARTING WITH # 2 FIRST ON PAGE 77 THEN WE WILL GO BACK TO # 1
Liquid Expansion/Contraction Demo pg 77, 75 https://www.youtube.com/watch?v=ISV2L_LQzYc
NB page 77 # 2 • What happened when the bottle system was placed in the hot water? Draw and explain.
NB PAGE 75: #1 • What happened when you placed your bottle system in cold water. Draw and explain: #1.
NB PAGE 77 Complete #3-5 using full sentences and details.
Mini-Assessment: I can explain how a gas will behave when heated or cooled. • Complete 1 and 2 using the word banks. Each phrase will only be used once! • Draw 2 pictures for part 3!
Journal page 79/Green book 23-27 Use what you have learned and observed today as well as the green book! 1. Look up the definition in the index! 2. Read the fourth paragraph on page 24! 3. Look at the caption below the picture on page 25! 4. Look at the General Rule 2 in bold on page 27! 5. Give one way they are the same – one way they are different!
Journal page 79/Green book 23-27 answer key 1. Energy of motion 2. Increase its speed, add heat 3. The air particles’ KE increases so they fly faster and hit each other harder, causing air to expand in the balloon. 4. It contracts, particles come closer together 5. Same: made of particles Different: space between particles OR how fast particles move
If time… http://studyjams.scholastic.com/studyjams/jams/science/matter/energy-and-matter.htm http://app.discoveryeducation.com/search?Ntt=expansion+and+contraction(expansion and contraction: 2:07) http://app.discoveryeducation.com/search?Ntt=expansion+and+contraction(expansion and contraction 1:37) http://www.brainpop.com/science/matterandchemistry/measuringmatter/(measuring matter)
Investigation 4 – day 3 Date: 9/4/14 LT: I can explain the effect of heating and cooling on gas, liquid, and solid particles. Sponge: Describe what happens to a liquid’s particles when heated and cooled. Discuss their movement and the space they take up!
Review… • How did you see air to expand? • How did you see water to expand? • How did you see air and water to contract? • Did you see more air or water when they were expanded? • So, what was the difference when air or water was expanded and contracted?
Question: • So, do solid materials like glass, rock, and metal expand and contract? How do you think we could find out?
Solid Expansion/Contraction Demo Brass sphere/ring demonstration: The sphere and ring are both made of a metal called brass. • What happens if I heat the ball? • What happens if I heat the sphere? • http://www.fossweb.com/delegate/ssi-wdf-ucm-webContent/Contribution%20Folders/FOSS/multimedia_ms_1E/ChemicalInteractions/teacher_videos/teachervid_4_3.html (FOSS demo if necessary) • https://www.youtube.com/watch?v=ZunJ7oHuttQ
Discussion/notes (page 78) Gas particles: • Move independently • When heated, move farther apart and gas volume increases Liquid particles: • Move but are in contact with one another • When heated, move farther apart and liquid volume increases Solid particles: • Can NOT move freely but do vibrate! • When heated, particles vibrate, move farther apart, and solid volume increases
Multimedia Examples • http://www.fossweb.com/delegate/ssi-wdf-ucm-webContent/Contribution%20Folders/FOSS/multimedia_ms_1E/ChemicalInteractions/molecules/particles.html (FOSS: particles in solid, liquid, and gas) • How does warming it up affect the KE? • How can you expand and contract the particles?
Teacher expansion/contraction examples (let’s compare) • https://www.youtube.com/watch?v=4UE_cxd7TEw • Gas: air in sports balls (basketball, soccer, etc), air in balloon • Liquid: alcohol in a thermometer, rings on fingers • Solids: metal lids on jars, bridge joints, sagging power lines in summer
Review for quiz Complete review sheet silently and independently. We will go over it together when everyone is done!
Mini-assessment if time… Complete the graphic organizer: you may use your notes!
If extra time… • http://www.youtube.com/watch?v=8abzpXCjyjA (kinetic/potential energy clip 4:35) • http://www.brainpop.com/science/energy/kineticenergy/ (kinetic energy) • http://studyjams.scholastic.com/studyjams/jams/science/matter/energy-and-matter.htm • (kinetic energy)
Investigation 4 – day 3 Date: 9/5/14 LT: I can describe the arrangement and motion of particles in solids, liquids, and gases. Sponge: Study your review sheet for the quiz!