Topic: Matter Aim: Describe the different properties and changes of matter. Do Now: Take out the mass and Volume HW Take out your Properties Reading notes.

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Presentation transcript:

Topic: Matter Aim: Describe the different properties and changes of matter. Do Now: Take out the mass and Volume HW Take out your Properties Reading notes Work on the Density ISA HW: Finish Density ISA

165.9g 511.0g

X Y Z Identify structures X, Y and Z. Support your answer. Identify the atomic number of this element. Support your answer. X Proton Y Neutron Z Electron Atomic # = 2 There are 2 protons.

1. Identify an example of a physical property. Size Color Shape Odor Texture States of matter Density Melting point

Heat conductivity Electrical conductivity Hardness

Sulfur Yellow solid Melting point: 112.8 C Boiling point: 444.6 C. Nitrogen dioxide Brownish-red gas at room temperature Poisonous gas. Melting point: -9.3 C Boiling point: 21 C. Density: 3.3 g/l. Mercury Silver, heavy, moveable liquid Melting point :38 C Boiling point: 356 C Very high density at 13.5 g/cm3 Sulfur Yellow solid Melting point: 112.8 C Boiling point: 444.6 C.

2. Identify an example of a chemical property. Flammability Heat of combustion Reactivity with other chemicals Chemical stability http://www.youtube.com/watch?v=afxwDTz_JTk&feature=related

A glowing wooden splint placed in a test tube will continue to burn until the O2 is used up.

3. Identify the type of change (physical or chemical) in which a new substance is produced. Chemical change

When the Statue of Liberty was built in 1886, the copper metal was copper in color. By 1900, it had turned a turquoise color because the copper underwent a chemical change. The metallic copper changed to a mixture of copper oxides, copper carbonates, copper sulfates, and copper chlorides due to exposure to various chemicals in the air and rain.

Boiling an egg causes a chemical change because the heating of the egg causes the protein in the egg to change shape which creates new proteins. When the egg cools down it doesn't look the same as it did before you heated it up..

Mixing vinegar and baking soda results in the mixture bubbles and fizzes. Water, carbon dioxide, and sodium acetate are produced. The chemical changes occurring when baking a bake results in sodium bicarbonate and tartaric acid in the baking powder reacting chemically to produce carbon dioxide gas so your cake will rise.

4. Identify an example of a physical change. Support your answer. Melting an ice cube Water molecules are still water molecules (There was nothing new produced.)

An example of a physical change occurs when making a baseball bat An example of a physical change occurs when making a baseball bat. Even though the wood has changed shape and therefore physical properties, the chemical nature of the wood has not been altered. The bat and the original piece of wood are still the same chemical substance. Making a baseball bat

NEW SUBSTANCES ARE PRODUCED 5. Identify an example of a chemical change. Support your answer. When hydrogen peroxide (H2O2) become water Oxygen bubbles Iron rusting produced iron oxide (Fe2O3) NEW SUBSTANCES ARE PRODUCED

Ex: burning of wood Ash and CO2 are produced

The fireworks we see on the 4th of July are examples of chemical changes. They are actually metals such as magnesium and copper that change chemically as they light up the night skies with their fantastic colors.

Let’s summarize… Explain what occurs during a chemical change. Explain what happens to a substances when a physical change occurs. What are some of the chemical changes of matter?

Physical or Chemical Property? Combustibility CP Density PP Malleability Tendency to corrode Weight Volume Failure to react Melting point Ductility Odor Texture Flammability

Physical or Chemical Change? Digestion of food CC Explosions Getting a haircut PP Lighting a candle Evaporation PC Tarnishing silver CP Ice cube melting Formation of acid rain Crushing rocks Dissolving salt in water

Review http://www.teacherbridge.org/public/bhs/teachers/Dana/chemphys.html

An example of a chemical change is 1) evaporation 2) condensation 3) burning 4) freezing