Warm-Up: 03/25 Copy down your homework Read your NEW objectives and essential questions Pass up any late/missing work Pass up your What is Matter? review worksheet from Friday Make sure you have a pen/pencil to write with today

Jump Start-physical properties *If you were asked to describe a piece of fruit to a person who has never seen this type of fruit before, what would you tell the person? *Be descriptive in your language. Do not write the name of your fruit on your paper. *Please DO NOT tell your classmates which fruit you have chosen to describe, because you will be sharing your response later. *Use both qualitative and quantitative data (remember this from the beginning of the year?). *Any volunteers want to read their fruit description to the class? (Please do not tell us what your fruit is before, we want to guess).

Warm-up SHARE YOUR PHYSICAL PROPERTY DESCRIPTION FROM THE HOMEWORK WITH YOUR TABLE PARTNER AND HAVE THEM GUESS WHAT IT IS (IF YOU DON’T HAVE A TABLE PARTNER SHARE WITH ANYONE IN CLASS).

Warm-Up: 03/26 Copy down your homework Take out your Jump Start activity if you did not get a turn yesterday Get out 1 piece of notebook paper and put a title---Secret Sack, put your heading (name/date/period#), and number 1-10 (leaving 4 lines in between each #)

Secret Sack PROCEDURE: Each Lab Group will receive a sealed paper sack containing a mystery object. Do not open the sack! For about 1 minute, make as many observations about the object as you can without opening the sack. You may touch, shake, or listen to the object through the sack. Record your observations. Be gentle!!!! They need to last all day. 

ANALYSIS on your own paper: Secret Sack Continued DO NOT LOOK IN THE BAGs WE WILL DO IT TOGETHER AT THE END. ANALYSIS on your own paper: 1. At the end of 1 minute, discuss your findings with your partners. 2. List the object’s properties that you can identify. 3. Make another list of properties that you cannot identify. Then make a conclusion about the objects identity. 4. Share out what you think is in each sack. 5. I will reveal what is in each sack. 6. Did you properly identify the object? If so, how? If not, why? Record your answers.```

Bag #1- 5 marbles Bag #2- 2 spools of thread Bag #3- 1 specimen jar Bag #4- 1 Easter egg Bag #5- 6 paper clips Bag #6- popsicle sticks Bag #7- 3 metal washers Bag #8- 5 cap erasers Bag #9- Yoda keychain Bag #10- Space Shuttle rubber ducky

Write out and answer the following questions in your Science notebook Warm-up Write out and answer the following questions in your Science notebook Which of the following are examples of matter? A. Dust C. Strand of hair B. The moon D. All of the above A graduated cylinder is used to measure A. Volume C. Mass B. Weight D. Inertia The volume of a solid is measured in A. Liters C. Cubic Centimeters B. Grams D. All of the above Mass is measured in A. Liters/Milliliters B. Newtons C. Kilograms/grams

Introduction to Matter Physical Properties: Density Solubility States of matter

Explain what happens to matter during a physical change. Objectives Analyze the physical properties of matter by discovering how physical properties such as density can help identify objects. Identify and compare the physical properties of matter to include density, melting/boiling points, states of matter, and solubility. Explain what happens to matter during a physical change.

Essential questions How are the physical properties of matter used to compare pure substances? What is density? What are the 4 states of matter? What is solubility?

What are Physical Properties? Something that can be observed or measured without changing the matter’s identity. What are Physical Properties?

What are some specific Physical properties? Thermal conductivity- how well a substance transfers heat Phase of matter- solid, liquid or gas Density- how much mass is in a given space Density=mass/volume or D=m/v Solubility- how well a substance dissolves in H2O What are some specific Physical properties?

Thermal conductivity

We will discuss the fourth state briefly in the states of matter section of this unit

Solubility

Solubility Solution= Solvent + Solute COPY THESE DEFINITIONS UNDER THE QUESTION ON THE LEFT SIDE OF YOUR NOTES. Solution= Solvent + Solute Solvent: The liquid part of a solution Solute: The solid/dry that is mixed and dissolved in the solution

Solubility Quick Lab (on your own paper) Materials: SOLUTES: Instant Coffee, Sugar, SOLVENT: water, 2 clear beakers, & spoons. Look at the two solids and hypothesize whether you think each one is soluble in water. Use the spoon to put 1 heaping spoonful of coffee into 1 beaker and use the other spoon to put 1 heaping spoonful of sugar into the OTHER beaker. Mix thoroughly and record your results. Which mixture created a SOLUTION? Which one did not?

Ductility Ability to shape into wires

Malleability Ability to mold into flat sheets and Shapes.

D=M/V

How will density help figure out what a substance is? In liquids, densest liquid sinks to the bottom, least dense floats on top. Solids can be checked against water’s density (1g/cm3), if solid floats it is less than 1g/cm3, if it sinks it is more than 1g/cm3 How will density help figure out what a substance is?

Density Demonstration What is the difference between these two golf balls in the water? mass, volume and density video density calculations (only play until 1:36)

How do you calculate Density? (the broken heart equation) What you need 1. Mass=m grams 2. Volume=V cm3, mL, m3, L Formula https://www.youtube.com/watch ?v=ijj58xD5fDI&feature=youtu. be How do you calculate Density? (the broken heart equation) m D= D= V

Create a chart with 4 columns Create a chart with 4 columns. Labels across the top from left to right: Item, Mass in grams, Volume in cm3, Density in g/cm3 Item Mass in grams Volume in cm3 Density in g/cm3 1 gem 2 gems Extra time: Mass something in the room-book, pencil…

Density QUICK LAB (1) Material Getter: (3) Data Collector: Graduated cylinder with 50-60 mL of Water, cup of gems, & triple beam balance. (2) Lab Initiator: Drop one marble into the water and observe the displacement Subtract to find the volume in cm3 (3) Data Collector: Mass the marble on the balance and record the mass (in grams). (4) Discussion Leader: Predict: Will the marble density come out the same if we follow the same steps with 2-8 marbles? How do we represent the units for density, why? What does the fraction bar mean?

What are physical changes? When matter is changed from one form to another without changing its identity. Example: water Water to ice, water to steam, steam to water What are physical changes? https://www.brainpop.com/science/matterandchemistry/propertychanges/

Physical change of state https://www.youtube.com/watch?v=zp5UoSNW5G8

More Physical change examples: Shape changes, like crushing a can, melting a popsicle, dissolving kool-aid, melting butter. These have changed shape, but are the same type of matter. More Physical change examples:

What are Chemical properties? Chemical properties describe ways that matter can change into new substances that will have different properties than the original substance. What are Chemical properties?

Specific chemical properties: will it burn or not Flammability or non-flammability will it burn or not Reactivity or non-reactivity will it react with something else Specific chemical properties:

Potassium reacting with H2O 2 K + 2 HNO3 ® 2 KNO3 + H2

Chemical Reactivity of elements

What are Characteristic properties? Properties that always remain the same no matter what size of sample there is. Can be chemical and/or physical. Describes the sample. What are Characteristic properties?

Characteristic properties magnetism Color of liquids Characteristic properties

What is a chemical change? A change that occurs when one or more substances change into an entirely new substance(s). Example: baking a cake

What are the signs of a chemical change? Fizzing and foaming Signs that a chemical Change has taken place are: Change of color Production of heat Fizzing and foaming Sound created Light created What are the signs of a chemical change?

What is composition? The type of matter (the stuff) that makes up an object and the way the matter is arranged in the object. Chemical changes change the composition of a substance. Example: electrolysis- H2O broken down into H and O gas

Can physical and chemical changes be reversed?? Many physical changes can be reversed, but chemical changes change the composition and are not easily, if at all, reversible. Can physical and chemical changes be reversed??

What is the main difference between physical and chemical changes? In a physical change the substances identity is unchanged In chemical they are... new substances that are formed What is the main difference between physical and chemical changes?

Chemical Changes

Objectives Review Answer the following questions in your notebook. Identify and compare the physical properties of matter to include density, melting/boiling points, states of matter, and solubility. Density and melting/boiling point are the most important physical properties in identifying matter. Explain what happens to matter during a physical change. A substance undergoes a physical change, but its identity stays the same. Also…List the six examples of physical changes. Breaking, melting, freezing, cutting, crushing, and dissolving.

WORD WALL Term Define Picture It Physical Property Density Physical Change Solubility Mass Volume Matter Phase of matter Malleability Ductility Thermal conductility

Review for Quiz What is matter? What is mass? Video clip: The difference between mass and weight What equipment did we use to measure mass in our labs and what units did we use? (Also be sure you know how to read the mass measurement on the device) What is volume? What units for the volume of a solid & a liquid and what are the 2 ways we measured volume in class? (1 other way to measure is the overflow method https://www.youtube.com/watch?v=LUicSCVkR5g) Be able to read the volume on a graduated cylinder and use the displacement method. What is density? Be able to use sink or float method to determine density and be able to use the density equation to find density. What is a physical property?