 Review Practice Open Response Questions 2. Classifying Matter  Physical vs. Chemical Changes Homework Study Guide- DUE Tomorrow  Review Practice Open Response Questions 2. Classifying Matter  Physical vs. Chemical Changes Homework Study Guide- DUE Tomorrow Major Celebration of Knowledge NEXT Tuesday Reading chemical formulas, measuring matter & physical vs. chemical changes Major Celebration of Knowledge NEXT Tuesday Reading chemical formulas, measuring matter & physical vs. chemical changes

A.Identify what property of the sample is being measured with the graduated cylinder. The property being measured with the graduated cylinder is volume of a liquid.

B.Identify the measurement of the sample in the graduated cylinder. Include units! The graduated cylinder shows a measurement of 36.5 mL.

C. Identify the measurement of the sample in the beaker. Include units. The beaker shows a measurement of 35 mL.

D.Explain why the measurements would be recorded differently when the sample is in the graduated cylinder and when it is in the beaker. The graduated cylinder is used to get a more accurate measurement because it has more intervals.

Topic Sentence For 1 st Property A. B. C. For 2 nd Property A. B. C. Conclusion Complete Sentences! Complete Sentences!

A. Identify the two properties of the cube that must be known in order for Jorge to determine the density of the cube. The two properties that must be known to determine the density of the cube are mass and volume.

B. Describe how Jorge could measure each of the properties of the cube you identified in part (a). Be sure to identify any tools Jorge would use and describe how he would use them. Jorge can use a triple beam balance to measure the mass of the cube. To determine the volume of the cube, he could use a ruler to measure the length, width and height of the cube and multiply them together.

C. Explain how the measurements you described in part (b) can be used to determine the density of the cube. The mass and volume of an object can be used to determine the density of the material. Density equals mass divided by volume.

MatterPure SubstanceElement Compound 2 or more elements CHEMICALLY joined Mixture 2 or more elements or compounds NOT chemically joined!

Chemical Changes

 Review Practice Open Response Questions 2. Classifying Matter  Physical vs. Chemical Changes Homework Study Guide- DUE Tomorrow  Review Practice Open Response Questions 2. Classifying Matter  Physical vs. Chemical Changes Homework Study Guide- DUE Tomorrow Major Celebration of Knowledge NEXT Tuesday Reading chemical formulas, measuring matter & physical vs. chemical changes Major Celebration of Knowledge NEXT Tuesday Reading chemical formulas, measuring matter & physical vs. chemical changes

MatterPure SubstanceElement Compound 2 or more elements CHEMICALLY joined Mixture 2 or more elements or compounds NOT chemically joined!

 Matter is everywhere.  Matter is anything that takes up space and has mass.  Matter is constantly experiencing both chemical and physical changes.

 A physical change alters the form of a substance, but does not change it to another substance.  It changes shape or size  It dissolves.  It changes phase (freezes, boils, evaporates, condenses)  Example: Making Orange Juice

 Physical changes occur when matter changes its property but not its chemical nature.  Physical property changes could include a change in: texture, shape, size, color, odor, volume, mass, weight, and density.

 Chemical changes are changes matter undergoes when it becomes new or different matter.  It burns  Temperature changes without heating/cooling  It bubbles (makes a gas)  It changes color  It forms a precipitate

 When a substance undergoes a chemical change, it is changed into a different substance with different properties.  To identify a chemical change look for signs such as color change, bubbling and fizzing, light production, smoke, and presence of heat.  Example: Baking a Cake

1. Precipitation 2. Color Change

4. Temperature Change 3. Gas Production

 A chemical change occurs when fireworks are used. Fireworks are made of metals such as magnesium and copper. These change chemically as they light up the sky.

 Sugar dissolving in tea Examples for Chemical Change  Logs burning  Breaking water up by separating it into hydrogen and oxygen

 Physical Change Ice melting?

 Toast burning?  Chemical Change

 Rocket fuel burning?  Chemical Change

 Metal rusting? Chemical Change

 Crushing an aspirin  A Boiled egg Physical Change

 Cutting paper? Physical Change

 Physical Change Sawing wood?

 Disappearing puddle?  Physical Change

 Candle burning?  Chemical Change

 Tears up paper? Physical change  Mixes salt and water? Physical change  Burns paper? Chemical change  Evaporates salt water? Physical change  Mixes vinegar and baking soda? Chemical change

 Write a paragraph about the difference between a chemical and physical change. Give examples of each.