Warm-up: Are cell phones and ipods allowed in the classroom? What will happen to them if the teacher...
-
Upload
barnaby-george -
Category
Documents
-
view
215 -
download
0
Transcript of Warm-up: Are cell phones and ipods allowed in the classroom? What will happen to them if the teacher...
![Page 1: Warm-up: Are cell phones and ipods allowed in the classroom? What will happen to them if the teacher sees or hears one (that includes headphones)?](https://reader036.fdocuments.in/reader036/viewer/2022062802/56649ea95503460f94bae42f/html5/thumbnails/1.jpg)
Warm-up:
• Are cell phones and ipods allowed in the classroom? • What will happen to them if the
teacher sees or hears one (that includes headphones)?
![Page 2: Warm-up: Are cell phones and ipods allowed in the classroom? What will happen to them if the teacher sees or hears one (that includes headphones)?](https://reader036.fdocuments.in/reader036/viewer/2022062802/56649ea95503460f94bae42f/html5/thumbnails/2.jpg)
Significant Figures - Measurements
• NO measurement is perfect. – All measurements have an uncertainty.– Human error IS NOT the cause of the uncertainly.
• Read and record a measurement to one decimal place beyond the smallest marking on that piece of equipment.
• With a digital device, record all digits.
![Page 3: Warm-up: Are cell phones and ipods allowed in the classroom? What will happen to them if the teacher sees or hears one (that includes headphones)?](https://reader036.fdocuments.in/reader036/viewer/2022062802/56649ea95503460f94bae42f/html5/thumbnails/3.jpg)
What is the Length?
• We can see the markings between 1.6-1.7cm• We can’t see the markings between the .6-.7• We must guess between .6 & .7• We record 1.67 cm as our measurement• The last digit an 7 was our guess...stop there
3
1 2 3 4 cm
![Page 4: Warm-up: Are cell phones and ipods allowed in the classroom? What will happen to them if the teacher sees or hears one (that includes headphones)?](https://reader036.fdocuments.in/reader036/viewer/2022062802/56649ea95503460f94bae42f/html5/thumbnails/4.jpg)
0 1 2
0 1 2
![Page 5: Warm-up: Are cell phones and ipods allowed in the classroom? What will happen to them if the teacher sees or hears one (that includes headphones)?](https://reader036.fdocuments.in/reader036/viewer/2022062802/56649ea95503460f94bae42f/html5/thumbnails/5.jpg)
0 1 2 3 4 5
![Page 6: Warm-up: Are cell phones and ipods allowed in the classroom? What will happen to them if the teacher sees or hears one (that includes headphones)?](https://reader036.fdocuments.in/reader036/viewer/2022062802/56649ea95503460f94bae42f/html5/thumbnails/6.jpg)
0 1 2
![Page 7: Warm-up: Are cell phones and ipods allowed in the classroom? What will happen to them if the teacher sees or hears one (that includes headphones)?](https://reader036.fdocuments.in/reader036/viewer/2022062802/56649ea95503460f94bae42f/html5/thumbnails/7.jpg)
0 1 2 3 4 5
![Page 8: Warm-up: Are cell phones and ipods allowed in the classroom? What will happen to them if the teacher sees or hears one (that includes headphones)?](https://reader036.fdocuments.in/reader036/viewer/2022062802/56649ea95503460f94bae42f/html5/thumbnails/8.jpg)
0 1 2
![Page 9: Warm-up: Are cell phones and ipods allowed in the classroom? What will happen to them if the teacher sees or hears one (that includes headphones)?](https://reader036.fdocuments.in/reader036/viewer/2022062802/56649ea95503460f94bae42f/html5/thumbnails/9.jpg)
Warm-up :
• Determine which of the following would give a more precise number if used.
– OR
0 10 1
![Page 10: Warm-up: Are cell phones and ipods allowed in the classroom? What will happen to them if the teacher sees or hears one (that includes headphones)?](https://reader036.fdocuments.in/reader036/viewer/2022062802/56649ea95503460f94bae42f/html5/thumbnails/10.jpg)
Where do we measure liquids
ABC
Always measureliquids at thebottom of the meniscusAND at eye level
![Page 11: Warm-up: Are cell phones and ipods allowed in the classroom? What will happen to them if the teacher sees or hears one (that includes headphones)?](https://reader036.fdocuments.in/reader036/viewer/2022062802/56649ea95503460f94bae42f/html5/thumbnails/11.jpg)
5
4
3
2
1
0
![Page 12: Warm-up: Are cell phones and ipods allowed in the classroom? What will happen to them if the teacher sees or hears one (that includes headphones)?](https://reader036.fdocuments.in/reader036/viewer/2022062802/56649ea95503460f94bae42f/html5/thumbnails/12.jpg)
2
1
0
![Page 13: Warm-up: Are cell phones and ipods allowed in the classroom? What will happen to them if the teacher sees or hears one (that includes headphones)?](https://reader036.fdocuments.in/reader036/viewer/2022062802/56649ea95503460f94bae42f/html5/thumbnails/13.jpg)
5
4
3
2
1
0
![Page 14: Warm-up: Are cell phones and ipods allowed in the classroom? What will happen to them if the teacher sees or hears one (that includes headphones)?](https://reader036.fdocuments.in/reader036/viewer/2022062802/56649ea95503460f94bae42f/html5/thumbnails/14.jpg)
1
0
![Page 15: Warm-up: Are cell phones and ipods allowed in the classroom? What will happen to them if the teacher sees or hears one (that includes headphones)?](https://reader036.fdocuments.in/reader036/viewer/2022062802/56649ea95503460f94bae42f/html5/thumbnails/15.jpg)
Warm-up:
• Measure the following using proper measuring technique so the answer has the correct number of sig figs.
0 1 20 1 2 3 4 5
![Page 16: Warm-up: Are cell phones and ipods allowed in the classroom? What will happen to them if the teacher sees or hears one (that includes headphones)?](https://reader036.fdocuments.in/reader036/viewer/2022062802/56649ea95503460f94bae42f/html5/thumbnails/16.jpg)
Accuracy
• Agreement with accepted or true value.• “Correctness”
![Page 17: Warm-up: Are cell phones and ipods allowed in the classroom? What will happen to them if the teacher sees or hears one (that includes headphones)?](https://reader036.fdocuments.in/reader036/viewer/2022062802/56649ea95503460f94bae42f/html5/thumbnails/17.jpg)
Precision
• The degree to which a set of data agrees with each other.
• A smaller range, the more precise the data.
![Page 18: Warm-up: Are cell phones and ipods allowed in the classroom? What will happen to them if the teacher sees or hears one (that includes headphones)?](https://reader036.fdocuments.in/reader036/viewer/2022062802/56649ea95503460f94bae42f/html5/thumbnails/18.jpg)
19. Which one is accurate but NOT precise
A B
DC
![Page 19: Warm-up: Are cell phones and ipods allowed in the classroom? What will happen to them if the teacher sees or hears one (that includes headphones)?](https://reader036.fdocuments.in/reader036/viewer/2022062802/56649ea95503460f94bae42f/html5/thumbnails/19.jpg)
20. Which one is precise but NOT accurate
A B
DC
![Page 20: Warm-up: Are cell phones and ipods allowed in the classroom? What will happen to them if the teacher sees or hears one (that includes headphones)?](https://reader036.fdocuments.in/reader036/viewer/2022062802/56649ea95503460f94bae42f/html5/thumbnails/20.jpg)
21. Which one is NOT accurate and NOT precise
A B
DC
![Page 21: Warm-up: Are cell phones and ipods allowed in the classroom? What will happen to them if the teacher sees or hears one (that includes headphones)?](https://reader036.fdocuments.in/reader036/viewer/2022062802/56649ea95503460f94bae42f/html5/thumbnails/21.jpg)
22. Which one is accurate AND precise
A B
DC
![Page 22: Warm-up: Are cell phones and ipods allowed in the classroom? What will happen to them if the teacher sees or hears one (that includes headphones)?](https://reader036.fdocuments.in/reader036/viewer/2022062802/56649ea95503460f94bae42f/html5/thumbnails/22.jpg)
Accuracy and Precision
![Page 23: Warm-up: Are cell phones and ipods allowed in the classroom? What will happen to them if the teacher sees or hears one (that includes headphones)?](https://reader036.fdocuments.in/reader036/viewer/2022062802/56649ea95503460f94bae42f/html5/thumbnails/23.jpg)
Accuracy and Precision in Measurements
Reading Thermometer 1
Thermometer 2
Thermometer 3
Thermometer 4
1 99.9°C 97.5°C 98.3°C 97.5°C
2 100.1°C 102.3°C 98.5°C 99.7°C
3 100.0°C 99.7°C 98.4°C 96.2°C
4 99.9°C 100.9°C 98.7°C 94.4°C
Average 99.98°C 100.1°C 98.5°C 96.9°C
Range 0.2°C 5.0°C 0.4°C 5.3°C
Accurate
Precise
YES
YES
YES
YES
NO NO
NONO
![Page 24: Warm-up: Are cell phones and ipods allowed in the classroom? What will happen to them if the teacher sees or hears one (that includes headphones)?](https://reader036.fdocuments.in/reader036/viewer/2022062802/56649ea95503460f94bae42f/html5/thumbnails/24.jpg)
To number or not to number, that is the question…..
• Observations or data that deals with numbers is called QUANTITATIVE.
• Observations or data that does NOT deal with numbers is called QUALITATIVE.
![Page 25: Warm-up: Are cell phones and ipods allowed in the classroom? What will happen to them if the teacher sees or hears one (that includes headphones)?](https://reader036.fdocuments.in/reader036/viewer/2022062802/56649ea95503460f94bae42f/html5/thumbnails/25.jpg)
Qualitative or Quantitative?
1. There are 6 tables in the room– A) Qualitative – B) Quantitative
2. The room is hot– A) Qualitative – B) Quantitative
3. This powerpoint sucks– A) Qualitative – B) Quantitative
4. There are lot of people in this room– A) Qualitative – B) Quantitative
![Page 26: Warm-up: Are cell phones and ipods allowed in the classroom? What will happen to them if the teacher sees or hears one (that includes headphones)?](https://reader036.fdocuments.in/reader036/viewer/2022062802/56649ea95503460f94bae42f/html5/thumbnails/26.jpg)
Types of Quantitative Information
• There are 2 types of quantitative data– Exact• Anything that is counted
– Ex. I have 10 fingers and 10 toes
• Exact relationships or predefined values– 12 inches = 1 foot– 1 dozen = 12
– Inexact (measured)• Anything that you measure using a tool (ruler, scale,
thermometer, etc)– The paper is 8.5 inches wide
![Page 27: Warm-up: Are cell phones and ipods allowed in the classroom? What will happen to them if the teacher sees or hears one (that includes headphones)?](https://reader036.fdocuments.in/reader036/viewer/2022062802/56649ea95503460f94bae42f/html5/thumbnails/27.jpg)
Exact or Inexact #’s
5. 1 yard = 3 feet– A) Exact– B) Inexact (measured)
6. The diameter of a red blood cell is 6 x 10-4cm.– A) Exact– B) Inexact (measured)
7. There are 2 doors in this room.– A) Exact– B) Inexact (measured)
8. Gold melts at 1064°C– A) Exact– B) Inexact (measured)
![Page 28: Warm-up: Are cell phones and ipods allowed in the classroom? What will happen to them if the teacher sees or hears one (that includes headphones)?](https://reader036.fdocuments.in/reader036/viewer/2022062802/56649ea95503460f94bae42f/html5/thumbnails/28.jpg)
Warm-up
• Come up with an example of the following:• Exact number• Inexact number• Quantitative observation• Qualitative observation
![Page 29: Warm-up: Are cell phones and ipods allowed in the classroom? What will happen to them if the teacher sees or hears one (that includes headphones)?](https://reader036.fdocuments.in/reader036/viewer/2022062802/56649ea95503460f94bae42f/html5/thumbnails/29.jpg)
Significant Figures
• The significant figures (sig figs) of a number are those digits that carry meaning contributing to its precision.
• Exact numbers have an infinite number of sig figs
• Inexact numbers have a finite number based on rules of sig figs.
![Page 30: Warm-up: Are cell phones and ipods allowed in the classroom? What will happen to them if the teacher sees or hears one (that includes headphones)?](https://reader036.fdocuments.in/reader036/viewer/2022062802/56649ea95503460f94bae42f/html5/thumbnails/30.jpg)
Significant Figures
• All non-zero numbers are always significant. Then use the following to determine if zeros are significant.–Determine if number has a decimal point.– If it does, look from left to right for the first
non-zero digit. All digits after it are significant– If it does not, go from right to left looking for
the first non-zero digit. All digits after it are significant.
![Page 31: Warm-up: Are cell phones and ipods allowed in the classroom? What will happen to them if the teacher sees or hears one (that includes headphones)?](https://reader036.fdocuments.in/reader036/viewer/2022062802/56649ea95503460f94bae42f/html5/thumbnails/31.jpg)
Significant Figures –Zero Rules
![Page 32: Warm-up: Are cell phones and ipods allowed in the classroom? What will happen to them if the teacher sees or hears one (that includes headphones)?](https://reader036.fdocuments.in/reader036/viewer/2022062802/56649ea95503460f94bae42f/html5/thumbnails/32.jpg)
Counting Sig Figs No decimal
254 3 SF304,900 4 SF
![Page 33: Warm-up: Are cell phones and ipods allowed in the classroom? What will happen to them if the teacher sees or hears one (that includes headphones)?](https://reader036.fdocuments.in/reader036/viewer/2022062802/56649ea95503460f94bae42f/html5/thumbnails/33.jpg)
Counting Sig Figs with Decimal
0.00450 3 SF7 SF1,000.000
![Page 34: Warm-up: Are cell phones and ipods allowed in the classroom? What will happen to them if the teacher sees or hears one (that includes headphones)?](https://reader036.fdocuments.in/reader036/viewer/2022062802/56649ea95503460f94bae42f/html5/thumbnails/34.jpg)
Practice: How Many Sig Figs?
0.00003280 g
1000 mL
3.14 m
21.001 cm
3 SF
5 SF
1 SF
4 SF
![Page 35: Warm-up: Are cell phones and ipods allowed in the classroom? What will happen to them if the teacher sees or hears one (that includes headphones)?](https://reader036.fdocuments.in/reader036/viewer/2022062802/56649ea95503460f94bae42f/html5/thumbnails/35.jpg)
Sig. Figs. in Calculations Addition and Subtraction
• By doing a math operation, you can not increase the number of significant figures!
• Addition and Subtraction – count DECIMAL PLACES– The number of decimal places in your answer
should match the digit with the smallest number of decimal places.
![Page 36: Warm-up: Are cell phones and ipods allowed in the classroom? What will happen to them if the teacher sees or hears one (that includes headphones)?](https://reader036.fdocuments.in/reader036/viewer/2022062802/56649ea95503460f94bae42f/html5/thumbnails/36.jpg)
Sig. Figs. in Calculations Multiplication and Division
• Multiplication and Division – Count SIGNIFICANT FIGURES.– The number of significant figures in your
answer should match the digit with the smallest number of significant figures.
![Page 37: Warm-up: Are cell phones and ipods allowed in the classroom? What will happen to them if the teacher sees or hears one (that includes headphones)?](https://reader036.fdocuments.in/reader036/viewer/2022062802/56649ea95503460f94bae42f/html5/thumbnails/37.jpg)
Adding & Subtracting Sig Figs
3.224 cm + 1000.3 cm = 1003.5 cmEstimated value Estimated value
![Page 38: Warm-up: Are cell phones and ipods allowed in the classroom? What will happen to them if the teacher sees or hears one (that includes headphones)?](https://reader036.fdocuments.in/reader036/viewer/2022062802/56649ea95503460f94bae42f/html5/thumbnails/38.jpg)
Practice
56.333 g + 1.0007 g =
25.005 L + 38.1 L =
0.01 g + 1.11 g =
3000 N + 144.2 N =
63.105 = 63.1 L
57.3337= 57.334 g
1.12
3144.2
g
= 3144 N
1.12
![Page 39: Warm-up: Are cell phones and ipods allowed in the classroom? What will happen to them if the teacher sees or hears one (that includes headphones)?](https://reader036.fdocuments.in/reader036/viewer/2022062802/56649ea95503460f94bae42f/html5/thumbnails/39.jpg)
Multiplying & Dividing Sig Figs
6.0 cm X 22.0 cm =2 SF 3 SF3 SF
132 =130 cm2
2 SF
![Page 40: Warm-up: Are cell phones and ipods allowed in the classroom? What will happen to them if the teacher sees or hears one (that includes headphones)?](https://reader036.fdocuments.in/reader036/viewer/2022062802/56649ea95503460f94bae42f/html5/thumbnails/40.jpg)
Practice
56.3 g 33 mL =
4.0 m X 22.3 m =
0.21 cm X 1.11cm X 2.0 cm =
89.2 = 89 m2
1.7060606 = 1.7 g/mL
0.46620.47 cm3