Investigation 4 – day 1 Date: 9/4 LT: I can compare expansion, contraction, and compression. Sponge: What do you think happens when you heat air in a hot.

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Presentation transcript:

Investigation 4 – day 1 Date: 9/4 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… Today is a 100 point lab day!

Kinetic Energy—What is it? Copy in index! Kinetic Energy: the energy of motion

Questions to discuss… Are particles moving in a solid? In a liquid? In a gas? How would heat affect their movement? Their kinetic energy? 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?

Explain the KE in each!

Gas Expansion/Contraction Demo ?v=ZPErStqSSMk ?v=ZPErStqSSMk Be prepared to draw a representation of the lab on NB !

NB 43

NB page 43 Answer Part 4: describe what happens to the balloon.

NB page 45

Gas Expansion/Contraction: BIG IDEAS! 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!!! Before we studied compression…what is the difference between compression and contraction?

NB 47 We heated and cooled a gas to cause contraction and expansion. Do you think liquids contract and expand? What about solids? Cold Water _______ Hot Water ____________ *Note: R = resting level, C = Cold level, H = Hot level Turn to number 2 first.

Liquid Expansion/Contraction Demo pg 47, 49 SV2L_LQzYc

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.

This is worth some candy…. What real life tool do we use that works because liquids expand and contract?

Solid Expansion/Contraction Demo Brass sphere/ring demonstration: The sphere and ring are both made of a metal called brass. How can I easily make the ball fit in to the sphere? How can I make it impossible for the ball to fit in to the sphere? webContent/Contribution%20Folders/FOSS/multimedia _ms_1E/ChemicalInteractions/teacher_videos/teachervi d_4_3.html (FOSS demo if necessary) webContent/Contribution%20Folders/FOSS/multimedia _ms_1E/ChemicalInteractions/teacher_videos/teachervi d_4_3.html

Investigation 4 – day 2 Date: 9/8 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…. Agenda

Multimedia Review from yesterday! ucm- webContent/Contribution%20Folders/FOSS /multimedia_ms_1E/ChemicalInteractions/ molecules/particles.html (FOSS: particles in solid, liquid, and gas) ucm- webContent/Contribution%20Folders/FOSS /multimedia_ms_1E/ChemicalInteractions/ molecules/particles.html Watch for… KE Expansion Contraction

AP: Copy kinetic definitions in index! Compression: The decrease of gas volume as a result of force (volume gets smaller because pushed upon). Contraction: The decrease of volume due to decreased KE of particles (volume gets smaller because heat removed). Expansion: The increase of volume due to increased KE of particles (volume gets bigger because heated up).

Comp: Copy kinetic definitions in index! 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!

Real Life Examples w w 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

Close Reading – NB 51 Look at number 5, we are going to use that strategy to break down the reading. Turn to NB 52 to see a better explanation. I will annotate my reading with you. Lets start on NB 53. Anywhere there is a number, a new CHUNK is starting and we need to summarize it! Gimme a second to flip on my document camera

If time…. More real life examples! w w