OBJECTIVE: WARM-UP: Give the basic definition for a physical change & a chemical change. Demonstrate knowledge of physical & chemical changes.
Physical Change Physical changes – Just a change in appearance, no new substance made. Physical property changes could include a change in: texture, shape, size, color, volume, mass, weight, and density.
Chemical Change Chemical changes- A change where a new substance is made & it has at least one indicator 5 Indicators: Temperature change, Color change, Gas produced, Light Produced, Precipitate Now let’s check your homework!
Study Guide Cut & Paste Activity 1.Fold your colored construction paper in half & draw a line on the fold line 2.Cut out & glue on top ½ of each section. titles Definitions Signs of this change What Happens 3. Cut out examples & glue on correct half of chart. Physical Change Chemical Change
Which statement is true about an exothermic reaction 1.Absorbs energy 2.Releases energy 3.Requires no energy 4.Container becomes colder
Which of the following is NOT an indicator of a chemical reaction? 1.Bubbles 2.Size change 3.Temperature change 4.Precipitate
During a chemical change a new substance is formed. 1.True 2.False
Which of the following would increase the rate of reaction? 1.Reducing heat/cooling 2.Larger particle size 3.Adding an inhibitor 4.Smaller particle size
A solid that forms from 2 liquids is called a … 1.Sublimation 2.Precipitate 3.Evaporate 4.Condensate
Which of the following is an example of a chemical change? 1.Melting butter 2.Mixing milk & chocolate syrup 3.Burning wood 4.Breaking glass
Which of the following is an example of a physical change 1.Leaves changing color 2.Rusting 3.Burning wood 4.Melting butter
Dissolving Sugar in Tea 1.Physical 2.Chemical
Logs Burning 1.Physical 2.Chemical
Cutting Paper 1.Physical 2.Chemical
Egg rotting 1.Physical 2.Chemical
Egg breaking 1.Physical 2.Chemical
Frying an egg 1.Physical 2.Chemical
Leaves changing color in the fall 1.Physical 2.Chemical
QUIZLET Search Quizlet for Mrs. Kelly Chemical Reactions Space here!!!
Is it a chemical or physical change? Sugar dissolving in tea Chemical Change Physical Change
OOPS! Did it change size, color, shape (Physical Change)? or Did it become different matter (Chemical Change)?
Correct!
Is it a chemical or physical change? Logs burning Chemical Change Physical Change
OOPS! Did it change size, color, shape (Physical Change)? or Did it become different matter (Chemical Change)?
Correct!
Is it a chemical or physical change? Cutting paper Chemical Change Physical Change
OOPS! Did it change size, color, shape (Physical Change)? or Did it become different matter (Chemical Change)?
Correct!
Is it a chemical or physical change? Crushing a Tylenol tablet Chemical Change Physical Change
OOPS! Did it change size, color, shape (Physical Change)? or Did it become different matter (Chemical Change)?
Correct!
Is it a chemical or physical change? Metal rusting Chemical Change Physical Change
OOPS! Did it change size, color, shape (Physical Change)? or Did it become different matter (Chemical Change)?
Correct!
Is it a chemical or physical change? Lighter fluid burning Chemical Change Physical Change
OOPS! Did it change size, color, shape (Physical Change)? or Did it become different matter (Chemical Change)?
Correct!
Is it a chemical or physical change? An egg rotting Chemical Change Physical Change
OOPS! Did it change size, color, shape (Physical Change)? or Did it become different matter (Chemical Change)?
Correct!
Is it a chemical or physical change? An egg breaking Chemical Change Physical Change
OOPS! Did it change size, color, shape (Physical Change)? or Did it become different matter (Chemical Change)?
Correct!
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INDEPENDENT WORK TIME Chemical Reactions worksheet, both sides (only up to #20) Skip #6, 10, 12, 19
DISCOVERY EDUCATION ARTICLE Read the Article: Chemistry Capers & answer the worksheet questions.