Recent Changes

Conlen O'D 10/31 11:34
Mectric measurements
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I. Measurement
{images.jpeg} Metric Ruler 10:56 10/29/13 Sarah Schultz

Q: In the number 060.00570, how many digits are significant?
A: 5. 6, 2 zeroes, 5 and 7.
David Z 10/31 8:13
What are increments?
Increments are the amount of change on a scale or between calibrated lines.
Q: Would a beaker with increments of 100 or a graduated cylinder with increments of 1 have more significant digits? Why?
A: The graduated cylinder would have more significant digits because smaller increments allow the person measuring to be more accurate. There fore adding more

Fact- specific heat is the time in which something takes to heat up or cool down.
Justin W 8:00 AM 10/31
Ding Ding S 7:15 10/29/13
Fact: Measurement dated back to the ancient Egypt. Ancient Egyptians measured the sun to determine time. They also had to measure so they could get exactly each side to face North, South, East, and west.
Ding Ding S 7:15 10/29/13
Fact - Measurement must be accurate and precise. The instrument used to measure something must be calibrated.
Kevin Y. 10-29 8:27pm
The triple beam balance is a single pan balance with three calibrated beams. The triple beam balance measures in grams.
Emily W 10/30/13 2:58
Fact: Mass never changes when the gravity changes but weight does.
Ding DIng S 10/30/13 8:15
Scales can also be used to measure mass
Sam E. 10-29 2:44
Q: How is a significant digit different from a non-significant digit?
A: A significant digit shows how precise a measurement is. More significant digits, such as more decimals, increases representation of how accurate a number is to the actual value. It can sort of be thought of as the opposite of "rounding."
Ding Ding S 10/29/13
Q: What is a Significant Digit and how does it make measurements more accurate?
A: A significant digit (sig fig) are digits that make make measurements more accurate by adding digits to the original value. For example if you measured 200cm and it looked a little over 200cm, you could add a .5cm which makes it 200.5cm. That makes the measurement more accurate to the exact measurement than leaving it 200cm.
Ding Ding S 10/29/13
Q: How does having equipment with more calibrated lines provide a more accurate measurement?
A: There are more significant digits to record as the equipment measures by 1s or 2s compared to 10s or 100s.
Emily Z. 10/31/13 8:15 AM
IV. Conversions [moving by the decimal point and dimensional analysis]
Fact: When converting from cm to meters move the decimal point 2 times to the left to get a smaller number.100cm=1m
Ding DIng S 8:11 10/30/13
Sarah Schultz 10/29/13 8:25
Fact: When you convert from kilometers to meters you move the decimal three spaces to the right

Fact- specific heat is the time in which something takes to heat up or cool down.
Justin W 8:00 AM 10/31
Fact: Measurement dated back to the ancient Egypt. Ancient Egyptians measured the sun to determine time. They also had to measure so they could get exactly each side to face North, South, East, and west.
Ding Ding S 7:15 10/29/13
Fact: Measurement dated back to the ancient Egypt. Ancient Egyptians measured the sun to determine time. They also had to measure so they could get exactly each side to face North, South, East, and west.
Fact - Measurement must be accurate and precise. The instrument used to measure something must be calibrated.
Kevin Y. 10-29 8:27pm
Length is measured in mm, cm, and m, with a metric ruler or meter stick.
Emily Z. 10/29/13 10:57 AM
{http://cdn.dickblick.com/items/554/27/55427-1012-3ww-l.jpg}
A ruler.
Emily Z. 10.31.13 8:14 AM
b. Mass & Weight
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The triple beam balance is a single pan balance with three calibrated beams. The triple beam balance measures in grams.
Emily W 10/30/13 2:58
Fact: Mass never changes when the gravity changes but weight does.
Ding DIng S 10/30/13 8:15
Scales can also be used to measure mass
Sam E. 10-29 2:44
{http://www.uwplatt.edu/chemep/chem/chemscape/labdocs/catofp/measurea/scales/pic/0046410a.jpg}
Divya B. 5:07 pm, 10/30/13
Q: How large is a liter?
A: A liter is about the size of a carton of milk.
Emily Z. 8:06 AM 10/31/13f
d. Temperature
Q: What are the freezing and boiling points in degrees Celcius?
A: The liquid expands with an increase in heat so it is forced up the tube and “rises”, and it contracts with a decrease in heat so it retracts back down the tube or “drops”.
Lisa S. 10-28 8:11am
{http://www.lhs.loganschools.org/~rweeks/cp1a/images/thermometer.gif}
Temperature comparisons.
Emily Z. 10/31/13 8:11 AM
You must immerse the thermometer to the line indicated on it.
Peter Yu 10/29/12 1:41pm
Q: How is a significant digit different from a non-significant digit?
A: A significant digit shows how precise a measurement is. More significant digits, such as more decimals, increases representation of how accurate a number is to the actual value. It can sort of be thought of as the opposite of "rounding."
Ding Ding S 10/29/13
Q: What is a Significant Digit and how does it make measurements more accurate?
A: A significant digit (sig fig) are digits that make make measurements more accurate by adding digits to the original value. For example if you measured 200cm and it looked a little over 200cm, you could add a .5cm which makes it 200.5cm. That makes the measurement more accurate to the exact measurement than leaving it 200cm.
Ding Ding S 10/29/13
Q: How does having equipment with more calibrated lines provide a more accurate measurement?
A: There are more significant digits to record as the equipment measures by 1s or 2s compared to 10s or 100s.
Ashwin S. 10/29 3:41
Dan W 643pm 10-19Its a song!
Significant digits show the accuracy of values.
Emily Z. 10/31/13 8:15 AM
IV. Conversions [moving by the decimal point and dimensional analysis]
Fact: When converting from cm to meters move the decimal point 2 times to the left to get a smaller number.100cm=1m
Ding DIng S 8:11 10/30/13
Sarah Schultz 10/29/13 8:25
Fact: When you convert from kilometers to meters you move the decimal three spaces to the right

Fact- specific heat is the time in which something takes to heat up or cool down.
Justin W 8:00 AM 10/31
Ding Ding S 7:15 10/29/13
Fact: Measurement dated back to the ancient Egypt. Ancient Egyptians measured the sun to determine time. They also had to measure so they could get exactly each side to face North, South, East, and west.
Ding Ding S 7:15 10/29/13
Fact - Measurement must be accurate and precise. The instrument used to measure something must be calibrated.
Kevin Y. 10-29 8:27pm
The triple beam balance is a single pan balance with three calibrated beams. The triple beam balance measures in grams.
Emily W 10/30/13 2:58
Fact: Mass never changes when the gravity changes but weight does.
Ding DIng S 10/30/13 8:15
Scales can also be used to measure mass
Sam E. 10-29 2:44
Q: How is a significant digit different from a non-significant digit?
A: A significant digit shows how precise a measurement is. More significant digits, such as more decimals, increases representation of how accurate a number is to the actual value. It can sort of be thought of as the opposite of "rounding."
Ding Ding S 10/29/13
Q: What is a Significant Digit and how does it make measurements more accurate?
A: A significant digit (sig fig) are digits that make make measurements more accurate by adding digits to the original value. For example if you measured 200cm and it looked a little over 200cm, you could add a .5cm which makes it 200.5cm. That makes the measurement more accurate to the exact measurement than leaving it 200cm.
Ding Ding S 10/29/13
Q: How does having equipment with more calibrated lines provide a more accurate measurement?
A: There are more significant digits to record as the equipment measures by 1s or 2s compared to 10s or 100s.
Dan W 643pm 10-19Its a song!
IV. Conversions [moving by the decimal point and dimensional analysis]
Fact: When converting from cm to meters move the decimal point 2 times to the left to get a smaller number.100cm=1m
Ding DIng S 8:11 10/30/13
Sarah Schultz 10/29/13 8:25
Fact: When you convert from kilometers to meters you move the decimal three spaces to the right

Yali I, 10/30/13 6:56
{metric.jpg}
Fact- specific heat is the time in which something takes to heat up or cool down.
Justin W 8:00 AM 10/31
Ding Ding S 7:15 10/29/13
Fact: Measurement dated back to the ancient Egypt. Ancient Egyptians measured the sun to determine time. They also had to measure so they could get exactly each side to face North, South, East, and west.

A: Accuracy is how close you are to the actual measurement. Precision is in conducting the procedure correctly, limiting human error.
Ben S. 10-29 4:11 PM
This tool is called a triple beam balance:
{reading-triple-beam-balance-worksheet-pdf.gif}
The scale is used to measure weight, in grams.
Eddie V. 10/30/2013 10:39
Q: What tool is used to measure temperature?
A: A Celcius thermometer
A: Length is the distance between two points and is one-dimensional [cm], surface area is l x w and is two-dimensional [cm2], and volume is l x w x h and is three-dimensional [cm3].
Lisa S. 10-28 8:11am
Weight is measures in milligrams, grams, and kilograms.
Eddie V. 10/30/2013 10:29
Length is measured in mm, cm, and m, with a metric ruler or meter stick.
Emily Z. 10/29/13 10:57 AM
Fact-mass is a factor of weight, but weight is not a factor of mass
Ben S. 10-29 4:37 PM
Q: What is the tool used to measure volume by displacement, and in which units does it measure?
A: The graduated cylinder uses milliliters to measure volume.
Eddie V. 10/30/2013 10:48
Adi E.
Q: What is Equilibrium?
Sarah S 7:47 10/29/13
Olivia G 10/29/13 6:15
The number 00340.000594 has 8 significant digit. All non-zero digits (3, 4, 5, 9, and 4) are significant. The three zeroes before 5 are significant, because they are after the decimal point.
Eddie V. 10/30/2013 10:56
Q: How is a significant digit different from a non-significant digit?
A: A significant digit shows how precise a measurement is. More significant digits, such as more decimals, increases representation of how accurate a number is to the actual value. It can sort of be thought of as the opposite of "rounding."
{Screen Shot 2013-10-30 at 2.33.14 PM.png}
Colin S. oct 29 1:54
Q: What are the two methods of converting units in the metric system?
A: MBTDP and Dimensional Analysis.
Eddie V. 10/30/2013 10:29
Q: How do you convert from kilometers to meterseters?A: You multiply by 1000, moving three places to the right [for example – 18.9 km = 18900 m]Lisa S. 10-8:11am {MEASUREMENT_13.gif}
Conversion table.

A: It is important so that when measuring something everyone is not confused as to witch measurement it is in
Dan W. 632pm 10-29-13
{http://www.gmasononline.com/PERCENTAGEERROR.gif}
Peter Yu 10:24pm 10/30/13
II. Equipment — Measurement — Unit[s]
Yali I, 10/30/13 7:03

Ding Ding S 7:15 10/29/13
Fact: Measurement dated back to the ancient Egypt. Ancient Egyptians measured the sun to determine time. They also had to measure so they could get exactly each side to face North, South, East, and west.
Fact -Measurement- Measurement must be
Kevin Y. 10-29 8:27pm
Fact-Fact - The English
Justin Wells 8:42 10/29/13
Kilo = Thousand
Divya B. 5:07 pm, 10/30/13
d. Temperature
Q: What are the freezing and boiling points in degrees Celcius?
A: They are 0 degrees Celcius, and 100 degrees Celcius respectively.
Kevin Y. 10-30 9:39pm
A thermometer, preferably Celcius, is used to measure temperature.
Kevin Y. 10-29 10:58am