U2-11 Properties and Changes Practice Tuesday, 09/03/2013 U2-11 Properties and Changes Practice Properties: Physical or Chemical Copper wire will conduct electricity. Oxygen is a gas a room temperature. Copper forms green copper carbonate when in contact with moist air. The density of sunflower oil is 0.925 g/mL. Magnesium will burn brightly when ignited. Iron has the ability to rust. Food is less likely to rot or decay if refrigerated. Potassium chloride will dissolve (is soluble) in water. The sugars in fruit juices will ferment in the absence of oxygen. Acids give candy a sour taste.

U2-11 Properties and Changes Practice Tuesday, 09/03/2013 U2-11 Properties and Changes Practice Properties: Physical or Chemical physical chemical

U2-11 Properties and Changes Practice Tuesday, 09/03/2013 U2-11 Properties and Changes Practice Properties: Physical or Chemical The melting point of ice is 0°C. Paper is a flammable material. Solid sodium explodes when in contact with water. Titanium is a hard metal with high tensile strength. Most metals have high thermal conductivity. Liquid water is not very chemically reactive. Wood will combust in the presence of oxygen. Aluminum is a lustrous, or shiny, metal.

U2-11 Properties and Changes Practice Tuesday, 09/03/2013 U2-11 Properties and Changes Practice Properties: Physical or Chemical physical chemical

U2-11 Properties and Changes Practice Tuesday, 09/03/2013 U2-11 Properties and Changes Practice Physical Properties: Extensive or Intensive Melting/freezing point Taste Boiling point Mass Length Hardness Volume Color Density Weight Odor Shape Electrical conductivity Thermal conductivity State of matter at room temperature Malleability Ductility Temperature Viscosity

U2-11 Properties and Changes Practice Tuesday, 09/03/2013 U2-11 Properties and Changes Practice Physical Properties: Extensive or Intensive intensive extensive intensive

U2-11 Properties and Changes Practice Tuesday, 09/03/2013 U2-11 Properties and Changes Practice Changes: Physical or Chemical The sand was separated from the water by filtration. Twenty (20) grams of sodium chloride was dissolved in 100 grams of water. Iron produces rust when exposed to oxygen. The tree was cut into logs. The bananas have ripened. The candle burned for three hours. Fifteen (15) grams of water became ice at 0°C. Potassium metal ignites when dropped in water. The coffee beans were ground with the coffee grinder.

U2-11 Properties and Changes Practice Tuesday, 09/03/2013 U2-11 Properties and Changes Practice Changes: Physical or Chemical physical chemical

U2-11 Properties and Changes Practice Tuesday, 09/03/2013 U2-11 Properties and Changes Practice Changes: Physical or Chemical The paper was crumpled before being placed in the recycling bin. Aluminum combines with oxygen to form aluminum oxide. Rubbing alcohol evaporates at room temperature. Potassium chlorate decomposes to produce potassium chloride and oxygen. Water droplets condensed on the outside of the tea glass. The mixture of alcohol and water was separated by distillation.

U2-11 Properties and Changes Practice Tuesday, 09/03/2013 U2-11 Properties and Changes Practice Changes: Physical or Chemical physical chemical

U2-11 Properties and Changes Practice Tuesday, 09/03/2013 U2-11 Properties and Changes Practice Changes: Physical or Chemical The silver platter is tarnished. The leaves change color each fall. Hydrogen peroxide was used to bleach her hair. The magnesium was cut into 1-cm ribbons. Milk sours if not refrigerated. The chalk was crushed with the mortar and pestle. Hydrochloric acid reacts with potassium hydroxide to produce a salt, water, and heat. Dry ice sublimes without melting. A match ignites when struck on a flint.

U2-11 Properties and Changes Practice Tuesday, 09/03/2013 U2-11 Properties and Changes Practice Changes: Physical or Chemical chemical physical

U2-11 Properties and Changes Practice Tuesday, 09/03/2013 U2-11 Properties and Changes Practice Chemical Change List four of the six indicators that provide evidence of chemical change. Writing Practice In a well-developed paragraph, explain the difference between a physical property and a chemical property and between a physical change and a chemical change. Use the terms: extensive, intensive, identity, reaction, composition, substance Give examples of each type of property and change. BONUS: Explain the difference between vaporization and evaporation.

U2-11 Properties and Changes Practice Tuesday, 09/03/2013 U2-11 Properties and Changes Practice Chemical Change List four of the six indicators that provide evidence of chemical change. Formation of a gas Formation of a precipitate Change in color Change in energy Change in magnetism Change in smell or production of odor