Warm up 10/13/15 Today we will begin our study of matter. Matter is anything that has mass and takes up space. List 3 examples of matter Can you think of something that is not matter?

Matter

Matter Anything that has mass and takes up space (volume) Examples: A brick has mass and takes up space A desk has mass and takes up space A pencil has mass and takes up space Air has mass and takes up space Mass vs. Weight All of the above examples are considered matter because they have mass and take up space. Can you think of anything that would not be considered matter?

Physical Properties of Matter any property of matter that is observed with the senses or measured without changing the identity of the matter Examples color shape taste state/phase density D = m V

Chemical Properties of Matter any property of matter that describes how a substance reacts with other substances Examples flammability reactivity with vinegar reactivity with oxygen Iron + Oxygen  Iron oxide (rust) 2Fe + 3O2  Fe2O3

Chemical or Physical Property? Paper is white Boiling point of H2O is 100oC Zinc reacts with hydrochloric acid and creates hydrogen gas Nitrogen does not burn Sulfur smells like rotten eggs Physical Property Physical Property Chemical Property Chemical Property Physical Property

Comparing Physical and Chemical Properties Substance/Matter Physical Property Chemical Property Helium Less dense than air Nonflammable Wood Grainy texture Flammable Baking soda White powder Reacts with vinegar to produce bubbles Powdered sugar Does not react with vinegar Rubbing alcohol Clear liquid Red food coloring Red color Reacts with bleach and loses color Iron Malleable Reacts with oxygen

Physical Change a change in shape, size, color, or state a change without a change in chemical composition a change that is reversible Examples tearing paper cutting your hair change in state

Changes in States (Physical Changes) Why do you think Bose-Einstein and plasma are not equally distanced from the other three states of matter? Ionization Plasma Disposition Recombination Vaporization (Evaporation/Boiling) Gas Condensation Melting Liquid Solid Freezing Sublimation All changes in state require a change in energy Bose-Einstein

Phase Changes Simulation PhET Harcourt School Pearson This is what happens when energy is added and/or taken away from matter

combining sulfuric acid and sugar Chemical Change a change in which a substance becomes another substance having different properties a change that is not reversible using ordinary physical means Changes that usually cause heat, sound, light, odor, fizzing/foaming, color changes You usually need more than one of the above characteristics to be considered a chemical change! Examples combining sulfuric acid and sugar burning a piece of wood soured milk

Chemical or Physical Change? Bending a Paper Clip Baking a cake The sublimation of carbon dioxide Crushing an aluminum can Vinegar and baking soda combining to create salt and water Physical Change Chemical Change Physical Change Physical Change Chemical Change

Assignment: complete the Physical/Chemical change practice handout.

Why do you think the person’s weight is less on the moon? Mass vs. Weight Mass a measure of how much matter an object is made of does not change, regardless of where something or someone is Weight the force of gravity on an object equal to the mass of the body times the local acceleration of gravity Why do you think the person’s weight is less on the moon? Mass = 59 kg Mass = 59 kg Weight = 579 N Weight = 96 N http://www.exploratorium.edu/ronh/weight/index.html

5 Physical States of Matter Bose-Einstein Solid Liquid Gas Plasma (Newest State)

Bose-Einstein Condensate Exist at extremely cold temperatures (around absolute zero or -460 oF) Particles are super unexcited Particles lock or “clump” together so firmly that they move as a single unit Definite shape and volume (?)

Solid Particles are tightly compact Particles vibrate without the ability to move freely Definite shape and volume Solid Animation

Liquid Particles are tightly compact, but able to move around close to each other No definite shape, but definite volume Liquid Animation

Gas Particles can easily spread out or move close together Particle move freely and with a lot of energy No definite shape or volume Gas Simulation

Plasma Why do you think this is the most common form/state of matter in the universe? Exist at extremely high temperatures (several million degrees Celsius) Particles are broken apart Particles move freely and with extremely high energy This form is not too common on Earth, however it is the most common form of matter in the universe No definite shape or volume (?) Examples: Florescent and neon lights, lightning, aurora borealis - + + + - -

Energy and the States of Matter The physical states of matter result from the amount of energy the particles composing the matter have. Basically, more energy means more movement for the particles and less energy means less movement. Energy/Temperature and Matter Simulations PhET BEC: Temperature and Absolute Zero If you were to compare an ice cube and the steam created from boiling water, which would you think has more energy?

States of Matter Continuum What about this continuum could be considered a little misleading? Taken from: http://www.chem4kids.com/files/matter_becondensate.html

Density a measure of the amount of matter present in a given volume of a substance typically expressed in the following units: grams per cubic centimeter (g/cm3) for solids grams per milliliter (g/ml) for liquids does not depend on how much of a substance you have (intrinsic property) – in other words, the density of a gold bar would be the same as the density of a gold flake can change as temperature and pressure change Which do you think is more dense? Why?

Layering Liquids Using a test-tube and the eyedroppers, try to layer the four different colored liquids so that the colors don’t mix and show distinct layers. Hold the test-tube in your hand at a 45 degree angle. Using the eyedropper from one of the colors, slowly place the liquid into the test-tube. Repeat step two using the other three liquids until you get them layered. Record the order of the colors. If you don’t get clear separation of the colors, you should empty the contents of the test tube down the drain and start again. These steps may need to be repeated several times until you discover the correct order of the colors. *Placing white paper behind the straws will help you see the divisions

Layering Liquids - Discussion Were you capable of layering the four liquids? If so, what was the correct order from the bottom up? What difficulties did you experience when performing this activity? Why do you think the liquids created layers when putting them in the test tube in the correct order? Because these liquids are miscible, or partially miscible, they did not really create distinct layers. What do you think it means to be miscible?

Calculating Density Density can be calculated by dividing the mass of an object by its volume Sample Problem Timothy found a solid metal block that has a mass of 100 grams and a volume of 25 cm3. What would be the density of the block? D = m V D = = 100 grams 4 grams cm3 25 cm3

Practice Problems D = D = 27 g 3.86 grams cm3 7 cm3 20 grams Find the density of a substance with a mass of 27 g and a volume of 7 cm3. 2. A block of maple has a mass of 20 grams and a volume of 26.5 cm3. What is the density of the block? D = m V 27 g 3.86 grams cm3 D = = 7 cm3 D = m V 20 grams 0.75 grams cm3 D = = 26.5 cm3

The Density Triangle V = m D D = m V m = D V . m . D V