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**Warm Up Which substance is best classified as being malleable?**

lead plate chocolate chip cookie ceramic tile glass panel

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**Chp 2 Activity 5 Investigation page 134**

WDYT? Since a kilogram of feathers and a kilogram of lead have the same mass, how do they appear different and why?

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**Investigation Volume and Mass of Water**

You Have 20 minutes to complete Part A: Copy the following data table into Log Book Volume and Mass of Water Mass of Graduated Cylinder Volume of water (mL) Mass of graduated cylinder and water (g) Mass of water (g) Mass Volume (g/mL) 1. 2. 3. 4. 5.

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Independent Work Checking Up Page 140 Questions

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**Chemistry In Activity Chem Saver Pages 7**

Precision vs. Accuracy Accuracy refers to how close a measured value agrees with the correct value. Precision refers to how closely individual measurements agree with each other. A precise measurement is one that we can make to a large number of decimal places.

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**Chemistry In Activity Chem Saver Pages 7**

Graduated Cylinder Burette Beaker

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**1045.010 7 Significant Figures The decimal point is present!**

Go to the Pacific Ocean and start walking across the United States until you hit a nonzero digit. After you hit the first nonzero digit, count all digits after that. These are all significant.

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**0.00560 3 Significant Figures The decimal point is present!**

Go to the Pacific Ocean and start walking across the United States until you hit a nonzero digit. After you hit the first nonzero digit, count all digits after that. These are all significant.

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**1045000 4 Significant Figures The decimal point is absent!**

Go to the Atlantic Ocean and start walking across the United States until you hit a nonzero digit. After you hit the first nonzero digit, count all digits after that. These are all significant.

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**Chemistry In Activity Chem Saver Pages 8**

Significant Digits If Decimal absent Start from the Atlantic go to the first whole number count it and every number to the left. 35360 = ______ If decimal Present Start from the Pacific go to the first whole number count it and every number to the right. = ______ 4 3

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**Practice Counting Significant Figures**

Measurement m 17.10 Kg 100,890 L 3.29x103 seconds cm 3,200,000 ml Significant Figures 5 4 3 2

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**3.013 rounded to the hundredths is**

3.02 3.045 rounded to hundredths is 3.05

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**Practice Rounding to 3 Significant Figures**

762 10.44 10789 14.3 10.4 10800 8020 204

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**MULTIPLYING and DIVIDING using Significant Figures**

Chemistry In Activity Chem Saver Pages 8 MULTIPLYING and DIVIDING using Significant Figures Example: x 3.10 x = 4 3 4 So your answer can only have ________ Significant digits 3.10 3 ________ Has the least number of significant Digits 5950 = ________

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**Chemistry In Activity Chem Saver Pages 8**

ADDING and SUBTRACTING using Significant Figures Example: = So must be rounded to _____ decimal place 1 2 1 2 2.1 20.7 ________ Has the least number of decimal places 20.69 = _________

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Independent Work Accuracy & Precision Worksheet

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Significant Figures 1.All non-zero digits are significant (2.45 has 3 SF) 2.Zeros between (sandwiched)non- zero digits are significant (303 has 3 SF)

Significant Figures 1.All non-zero digits are significant (2.45 has 3 SF) 2.Zeros between (sandwiched)non- zero digits are significant (303 has 3 SF)

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