today is: monday, october 17th get out your … · today is: monday, october 17th 10/17/2016...

Today is: Monday, October 17th

10/17/2016 #motivationmonday (This is Week 11 Warm Ups!)1. It’s a new quarter, which means a fresh start! What can you

do to stay motivated this quarter?2. How is sublimation different than vaporization, condensation,

and melting?a. Vaporization, condensation, and melting all include a solid

phase.b. Sublimation takes place at much higher temperatures

than the other three.c. Sublimation generates its own heat energy.d. Sublimation does not include a liquid phase.

Science News: Why is waking up so hard?

https://safeshare.tv/x/ss5800037c03778

3. During which stage of sleep is it most difficult to wake up and why? Why shouldn’t you hit the snooze button? 3 complete sentences!

Agenda:● Signs of a

Chemical Reaction

Last Class:● Physical vs.

Chemical Changes

Next Class:● Signs of a

Chemical Reaction

Learning Target:● I can identify evidence of a chemical change.

Get out your homework!



Answer to Warm Up Question #2:

How is sublimation different than vaporization, condensation, and melting?

a. Vaporization, condensation, and melting all include a solid phase.b. Sublimation takes place at much higher temperatures than the other

three.c. Sublimation generates its own heat energy.d. Sublimation does not include a liquid phase.

Why?!

Trade & Grade Homework

If you were absent, turn in both of these assignments when you return to school!

https://drive.google.com/file/d/0BxE8-okx7XxtQXRPU1p5NDFLdjQ/view?usp=sharing

https://drive.google.com/file/d/0BxE8-okx7XxtUUNoSUIzVGFjVVU/view?usp=sharing







4 3 2 1

In addition to mastering level 3, I make in-depth inferences and applications that go beyond what was taught in class.

I am able to classify:

● Physical properties (states, density, boiling point, melting point, solubility)

● Chemical properties (reactivity, pH, acid/base/neutral, oxidation)

● Physical Changes (i.e., phase change)

● Chemical Changes (i.e., color change, endothermic, exothermic, generation of a gas, precipitate)

I am able to explain: ● how the transfer of energy

can affect the physical/chemical properties of matter.

I can define the following terms:

● Physical property

● State (solid, liquid, gas)

● Density

● Boiling point

● Melting point

● Solubility

● Physical Change

● Phase change

● Chemical property

● Reactivity

● pH, acid, base, neutral

● oxidation (corrosion)

● Chemical reaction

● Color change

● Generation of gas

● Precipitate

● Endothermic reaction

● Exothermic reaction

With help, I can perform at level 2.

I am able to identify: matter based on physical/chemical properties, the evidence of a physical/chemical change and how the transfer of energy affects the physical/chemical properties of matter.

Activity #24Signs of a

Chemical Reaction

Materials for Today● 10mL of Vinegar (Acetic Acid)● Baking Soda (Sodium Bicarbonate) in a cup● Lab Scoop● Test Tubes● Test Tube Rack● Test Tube Brush

Lab Sheet for Notes and Observations

https://docs.google.com/document/d/1sEkXsDK4007VYngfCDFIJTP2MVZKYuNh86XShEYFpXU/edit?usp=sharing




Chemical Reactions ■ Produce new substances by changing the way in which atoms are arranged.

REACTANTS= substances used in a chemical reaction

PRODUCTS= substances formed by chemical reaction

6 Signs of a Chemical Reaction

1. Odor Change2. Formation of a Gas3. Endothermic Reaction4. Exothermic Reaction5. Formation of a Precipitate6. Color Change

6 Signs of a Chemical Reaction!

1. ODOR CHANGE■ Produces new smells as the reaction

occurs■ Examples: Rotting, bad breath, body odor

Sign #2: Formation of a Gas

■ Reactants: Baking Soda (Sodium Bicarbonate) and Vinegar (Acetic Acid)

■ 5 mL of Vinegar in test tube■ 1 lab scoop of baking soda


FORMATION OF A GAS■ Bubbles often appear ■ Fizzes ■ A product gas is leaving the reaction mixture■ Examples: vinegar + baking soda = carbon

dioxide

Sign #3: Endothermic Reaction

■ Reactants: Citric Acid and Baking Soda (Sodium Bicarbonate)

■ 10 mL Citric acid in test tube■ Take temperature■ Combine w/ 1 lab scoop of baking soda■ Swirl and observe temperature!


ENDOTHERMIC REACTION (temperature/energy change)

■ Chemical bonds break■ Energy (heat) is absorbed from surroundings■ Substance seems cooler■ Examples: baking, cold packs, photosynthesis

Sign #4: Exothermic Reaction

■ Reactants: Hydrogen Peroxide and Yeast■ 10 mL Hydrogen Peroxide in test tube■ Take temperature■ Combine w/ 1 lab scoop of yeast■ Swirl and observe temperature!


EXOTHERMIC REACTION (temperature/energy change)■ Chemical bonds are made■ Energy (heat) is released to surroundings■ Substance seems warmer■ Examples: fireworks, explosions, hand warmers

Sign #5: Color Change

■ Reactants: Cabbage Juice and Vinegar; Cabbage Juice and Baking Soda

■ Add 10 mL of cabbage juice to 2 test tubes■ Add 3 drops of vinegar to one test tube■ Add one lab scoop of baking soda to another


COLOR CHANGE■ Substances change color■ Color change is a product of two or more reactants■ Examples: Rust, leaves changing color, mold

Sign #6: Formation of a Precipitate

■ Reactants: Ammonia and dissolved Epsom Salt


A PRECIPITATE IS FORMED■ A solid that forms when two liquids combine■ The solid particles are the product ■ Examples: Kidney stones, pearls, cheese

Academic Lab

Please get out a book and begin reading!

Separating Mixtures Lab

Separating Mixtures Lab

Objective:Separate a mixture of salt, iron filings, pepper, and sand by each substance’s physical properties.

Procedure:•You and your group will need to come up with a procedure to separate each part of the mixture (yes, it’s possible!!)•Think about what physical properties you could use to separate each substance!

Materials:•Funnel•Coffee Filter•Graduated Cylinder•Spoon•Beaker•Magnet•Paper plate•Iron Filings•Salt•Pepper•Sand

Exit ticket

1. What physical changes did you observe when you separated the mixture with your group?

2. How successful were you (on a scale of 1-10) in separating and recovering each of the four components? Justify your success based on your observations.

Academic LabPhysical vs. Chemical Change Lab

https://docs.google.com

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https://docs.google.com/document/d/1ntdGBhNPF60Ym_pRbMW-DL5oUera8121lWEAL6OAs6Q/edit?usp=sharing





OBJECTIVE: To differentiate between chemical & physical changes.

BACKGROUND: When a physical change occurs, only the form of the substance changes. Chemical changes, however, result in the formation of new substances with different properties. Some general signs of a chemical change include a change of color or odor, the formation of a precipitate (solid), the formation of a gas, and a change in heat or light. In this lab, you will perform different activities and, based on your observations, determine whether a chemical or physical change has taken place.


SAFETY:

Before lighting the match, tie back long hair and secure loose clothing. After extinguishing the match, thoroughly douse it with water before placing it in the designated waste beaker.

Do not ingest any chemicals.Absolutely no goofing off.


MATERIALS: Match ChalkVinegarWaterSucroseCalcium Chloride SolutionSodium Carbonate SolutionMortar and PestleTest TubesCandleFoil SquareTongs


PROCEDURE:Perform each of the following activities and carefully observe what happens. After each activity, complete your data table.Lighting a match – Light a single match (refer to safety precautions listed above).Lighting a candle: Light a single candle. Observe the candle for 45 seconds. Heating Sucrose: Take a pinch of sugar and place it on the foil. Using the tongs, hold the foil

over the candle for approximately 1 minute.Crushing chalk – Use a mortar and pestle to crush a piece of chalk.Mixing crushed chalk with vinegar – In a test tube, mix a small amount of the crushed chalk

from Activity #2 with vinegar.Mixing crushed chalk with water – In a test tube, mix a small amount of the crushed chalk from

Activity #2 with water.Dissolving sucrose in water – In a test tube, dissolve a small amount of sucrose in water.Mixing CaCl2 and Na2CO3 solutions – In a test tube, combine several drops each of the calcium chloride and sodium carbonate solutions.


DATA:

Activity Title Chemical or Physical Change Evidence

Lighting a Match Lighting a match is a _______ change because...


ANALYSIS:Directions: Look at each of the following situations and identify as CHEMICAL or PHYSICAL, then explain why.

1. A bridge is rusting __________________WHY?

2. Ice cube melting __________________WHY?

3. Mix baking soda and Vinegar __________________WHY?

4. Cooking a hamburger __________________WHY?

5. Solid Air Freshener __________________WHY?

6. A pane of glass is shattered __________________WHY?


CONCLUSION:Explain what a chemical & physical change is and give examples of each. Your audience is third graders. Use complete sentences.

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today is: monday, october 17th get out your … · today is: monday, october 17th 10/17/2016...

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