Investigation 7 Date: 10/7 LT: I can differentiate between melting and dissolving. Sponge: Give an example in your life of when something MELTED and when something DISSOLVED.

To do… Agenda

Pre lab discussion… Consider these yummy M&Ms… – How would you melt them? – How would you dissolve them? Lets try it! We can even eat the leftovers 100 point lab day warning!

NB page 71 Read all directions! Gather the following materials per Group… – 2 Foil Cups – 1 Plastic Cup with hot water – 1 Plastic Cup with cold water – 4 Bags of Candy – 1 Paper Towel

NB pg 71 Special reminders… – DO NOT EAT UNTIL TOLD! – Open your package of M&Ms and remove 1 red one. Set your package aside. If I correct you AT ALL, EVEN ONCE, I take your bag away. – Every person submits one candy. – Place one in each water cup, one in each foil cup.

NB 73 Place pic here

What Happened? Observe the M&Ms in the foil first…. – What happened to the chocolate? – What happened to the coating? – One person “squish” them. What is different about them? Observe the M&Ms in the water next… – What happened to the colored coating in the water? Where did the candy coating go? – What happened to the chocolate? – One person “squish” them. What is different about them?

BIG IDEAS! In order to melt…you need HEAT! In order to dissolve…you need liquid!

Copy on page 72…

Copy in your index… Melting: phase change from solid to liquid which needs added kinetic energy from heat Dissolving: when a solid is placed in to a liquid and disappears

Now you may eat!!!! Clean Up… – Trash candy bags – Trash foil cups – Return Plastic Cups – Trash Paper Towel

If time allows… Sick Science with CANDY- – – – nt-of-the-week/valentines-day-candy-science- experiments/ nt-of-the-week/valentines-day-candy-science- experiments/ – – dy-corn-in-space.html dy-corn-in-space.html – =37067&CategoryID= =37067&CategoryID=11344

Investigation 7 Date: 10/8 LT: I can differentiate between melting and dissolving. WU: Melting requires _____. Dissolving requires _______.

To do

Review…. What is the difference between melting and dissolving? ing+vs+Dissolving

Pre lab discussion… Do a candle and ice cream melt? Do they melt at the same temperature?

NB pg 75 Yesterday we tested how something can dissolve or melt. Today we are going to try to melt three materials and discover what temperatures they melt at. 3 materials will be: – Margarine – Wax – Sugar

NB pg 75 Insert pic

388d1f1b0e56f5bb11/Melting-Sugar b0e56f5bb11/Melting-Sugar

Discuss observations! Which item melted at the lowest temperature? Second lowest? Which didn’t melt? At the start, the items were all ______. After heating, two became __________. If I let the items sit here, what will eventually happen? Why?

Discuss observations… If you could see the particles, what would be happening as they melt? If you could see the particles, what would be happening as the cool? When they cool, are they freezing? Does freezing always happen at the same temperature? Does it have to be REALLY COLD to freeze?

Clean Up Return plastic cups and thermometers Trash paper cups

Complete the questions on NB 77 together!

Copy on page 76!

Real life application of science…making candy! shows/how-its-made/videos/how-its-made- candy-canes.htm shows/how-its-made/videos/how-its-made- candy-canes.htm – Candy Canes m7wU m7wU shows/videos/time-warp-cotton-candy- tech.htm shows/videos/time-warp-cotton-candy- tech.htm

Investigation 7 Date: 10/9 LT: I can explain the following processes at the particle level: melting, freezing, evaporation, condensation. Sponge: In order to increase KE, I need to add ___________.

To do…

Record the answers as a group on your whiteboard… Be prepared to share! For 1 and 2, fill in the blanks with solid, liquid or gas. 1. Melting is from _____ to ______. 2. Freezing is from _______ to _________. For 3 and 4, fill in the blanks with more or less. 3. Melting requires ______ KE. 4. Freezing requires _______ Ke.

Erase your whiteboard! 5. Does everything melt at the same temperature? 6. Does everything freeze at the same temperature?

Erase your whiteboard! 7. Give a real life example of something that melts at a low temperature. 8. Give a real life example of something that melts at a high temperature.

Erase your whiteboard… 9. Is change of state a chemical reaction? Why or why not?

Discussion summary… Melting is a change of state from solid to liquid. Freezing is a change of state from liquid to solid. Change of state is the result of change of KE of the particles of a material. Nothing changes during change of state except the motion of the particles. They do not change in to any other kind of particle!

Discussion summary… Change of state is not a chemical reaction since no new products are formed! Substances change state at their own temperature. For instance, water freezes and melts at 0 degrees. Alcohol in a thermometer freezes at -98 degrees. Iron freezes at 1538 degrees!

Copy on page 78…

Performance Assessment – Phase Change 1. Melting requires ___________. 2. Dissolving requires a _____________. 3. All substances melt at the same temperature. True or false? 4. Phase changes are a chemical reaction. True or false? 5. The three states of matter are ________, __________, and _________.

Complete the Questions on NB 79 independently! Here are hints…Use page 42 – 48 for reference. 1. Read the 3 rd paragraph under “Phase Change” on page Copy the bold black sentences on page 46 and Look at the picture and the caption on page 46! 4. Look at the chart on page 48. Do the particles speed up or slow down?

NB 79 Key 1. Heat! Energy transfer! 2. Substances don’t have to be cold to freeze. Phase is a relationship between particles. Freezing temperature = melting temperature. 3. The evaporated water condenses on the cup. 4. The particles speed up!

Investigation 7 Date: 10/13 LT: I can explain the following processes at the particle level: melting, freezing, evaporation, condensation. Sponge: Water freezes at ___________ degrees.

To do… Check HW Agenda

Review We’ve explored solids and liquids. What state of matter have we not yet explored? We’ve explored freezing and melting. What phase changes have we not yet explored? Intro to sublimation and deposition: – If solids skip the liquid phase to become a gas, it is called sublimation. – If a gas skips the liquid phase to become a solid, it is called deposition. – Tomorrow we’ll discuss condensation and evaporation!

Pre Lab Discussion I have this cup of hot water. The particles have enough KE to be a liquid. What if I continued adding heat (and KE!)?

Pre Lab Discussion When the particles of this liquid have enough KE to break away, they will fly in to space and become a gas. If water boils and turns in to a gas, where does it go? What is water gas called? Can you see it? What could we do to prove it exists…. – Hint…think of breathing on a car window when the car is toasty and its snowy outside!!

NB 87

Discussion When the water gains enough energy to become a gas, it is called evaporation! When the water vapor (GAS) hits the cool cup, the gas loses KE and becomes a liquid again. This is called condensation! Are these phase changes or chemical reactions?

Copy on NB 86

Challenge…. How can I make the condensed liquid now turn in to ice (solid water)? What if I made the gas turn straight in to a solid? Think back to Friday…what are these two processes called?

Copy in your index! Evaporation: phase change from a liquid to gas requiring added KE Condensation: phase change from a gas to liquid requiring a loss of KE Freezing: phase change from liquid to solid from losing KE

Copy in your index! Deposition: phase change from gas to solid requiring a huge loss in KE Sublimation: phase change from solid to gas requiring a huge gain in KE

(If time) Response Sheet page 121 Write at least 4 well constructed sentences. This will help us review yesterday!

Investigation 7 Date: 10/14 LT: I can explain the following processes at the particle level: melting, freezing, evaporation, condensation. Sponge: Give one real life example of melting, condensation, and evaporation.

To do… Check HW

Exploring Phases of Matter Video As you watch the video, work on the VIDEO QUIZ. After the video, we will complete the POST TEST. Word bank is on the next slide… Then, we will apply what we have learned to identify the phase changes in the READING EXERCISE. – Write your story for #5 in your notebook below your sponge. I must be able to read it! The best story gets the prize

Word Bank –Post Test Solid, liquid, gas, matter, more, less, 0, 100, melting, evaporation, energy, change

Performance Assessment – Phase Change Choose evaporation, condensation, melting, or freezing 1. Solid to liquid is… 2. Liquid to solid is… 3. Gas to liquid is …. 4. Liquid to gas is … Choose solid, liquid, or gas…. 5. The state of matter with the most KE is …

Investigation 7 Date: 10/15 LT: I can explain the following processes at the particle level: melting, freezing, evaporation, condensation. Sponge: Is making koolaid an example of dissolving or melting?

To do…

Virtual lab NB page

Reteach: Properties of MatterR Do the matching only!

Number 2 Describe one difference between a physical property and a chemical property. (2) A physical property is one that can be observed or measured without changing the identity of the substance, while a chemical property is observed or measured while a substance is interacting with another substance.

Number 3 Luster: This property of a substance determines how much light reflects off of its surface. electrical conductivity: This property of a substance determines if it will allow an electrical current to run through it or not. boiling point: This property of a substance is the temperature at which it will turn from its liquid state to its gas state.

Investigation 7 Date: 10/16 LT: I can explain the following processes at the particle level: melting, freezing, evaporation, condensation. Sponge: As water freezes, the particles move ___________. As water evaporates, the particles move ________________.

To do…

Phase Change Thinking Links

Phase Change Vocabulary

Quiz Review Guide

Investigation 7 Date: 10/19 LT: I can explain the following processes at the particle level: melting, freezing, evaporation, condensation. Sponge: Which phase of matter has a set shape and volume?

To do…

Phase Change Poster Gather supplies… White paper Crayons

Phase Change Poster Title it PHASE CHANGE POSTER at the top. Put your name below the title.

Phase Change Poster Put these words on your poster.

Phase Change Poster Draw a picture to illustrate solid, liquid, and gas. Draw a box of 10 particles of each a solid, liquid, and a gas.

Phase Change Poster Use red to draw arrows showing melting. Along the arrow, write ADD KE and MELTING.

Phase Change Poster Use blue to draw arrows showing freezing. Along the arrow, write REMOVE KE and FREEZING.

Phase Change Poster Use green to draw arrows showing evaporating. Along the arrow, write ADD KE and EVAPORATING.

Phase Change Poster Use orange to draw arrows showing evaporating. Along the arrow, write REMOVE KE and CONDENSATION.

Phase Change Poster Use purple to draw arrows showing sublimation. Along the arrow, write ADD KE and SUBLIMATION.

Phase Change Poster Use brown to draw arrows showing deposition. Along the arrow, write REMOVE KE and DEPOSITION.

Phase Change Poster In blank space, write… – Phase changes are not chemical reactions!

Phase Change Poster In blank space, write… – Phase changes happen at different temperatures!

Study this poster and your study guide from yesterday for tomorrow’s

If time…. Brainpop: Matter Changing States Study James: Energy and Matter Song: phase-changes-of-water-song phase-changes-of-water-song pM 85pM