Topic Temperature Percent Error Density again Do Now

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Topic: Temperature & Percent Error & Density again Do Now: Look at test objectives

Topic: Temperature & Percent Error & Density again Do Now: Look at test objectives

Temperature Scientifically speaking … The definition of temperature: Temperature is measure of average kinetic

Temperature Scientifically speaking … The definition of temperature: Temperature is measure of average kinetic energy of particles in system

Absolute Zero • Zero on the Kelvin scale: point at which all matter is

Absolute Zero • Zero on the Kelvin scale: point at which all matter is said to stop moving

World’s Record Cold Temperatures Date World (Antarctica) Vostok II Verkhoyansk, Russia(Siberia) Asia Oimekon, Russia

World’s Record Cold Temperatures Date World (Antarctica) Vostok II Verkhoyansk, Russia(Siberia) Asia Oimekon, Russia Greenland Northice N. A. Snag, Yukon, Canada U. S. Prospect Creek, Alaska U. S. (other than AK) Rogers Pass, Mont. ˚F ˚C 7/21/1983 2/7/1892 2/6/1933 1/9/1954 2/3/1947 1/23/1971 – 129 – 94 – 90 – 87 – 81 – 80 – 89 – 70 – 68 – 66 – 63 – 62 1/20/1954 – 70 – 56. 5

Conversion formulas How can we convert from one temperature scale to another? K =

Conversion formulas How can we convert from one temperature scale to another? K = °C + 273 (more precisely 273. 15) °C = K – 273 [F = (9/5 °C) + 32]

Percent Error measuredaccepted value – accepted value x 100% value use absolute value –

Percent Error measuredaccepted value – accepted value x 100% value use absolute value – answer always positive

Data table Students were asked to find the density of sucrose [Sucrose has a

Data table Students were asked to find the density of sucrose [Sucrose has a density of 1. 59 g/cm 3] Student A (g/cm 3) Student B (g/cm 3) Student C (g/cm 3) Trial 1 1. 54 1. 40 1. 70 Trial 2 1. 60 1. 68 1. 69 Trial 3 1. 57 1. 45 1. 71

Advantage of % Error • Makes it easier to compare data, especially if comparing

Advantage of % Error • Makes it easier to compare data, especially if comparing data from different trials

Density Review M D V

Density Review M D V

Looking at this graph again, what is the density of pyrite? HINT: SLOPE What

Looking at this graph again, what is the density of pyrite? HINT: SLOPE What is this graph missing?

Scientific Notation • The number is written as the product of two other numbers:

Scientific Notation • The number is written as the product of two other numbers: – A number between 1 and 10 (not 10) – and – A power of 10

Converting conventional to scientific notation For numbers 1, 1 the exponent will be positive

Converting conventional to scientific notation For numbers 1, 1 the exponent will be positive Count how many places the decimal is moved. 329 3. 29 X 102

Converting conventional to scientific notation For numbers between 0 and 1, 1 the exponent

Converting conventional to scientific notation For numbers between 0 and 1, 1 the exponent will be negative Count how many places the decimal is moved. 0. 00045 4. 5 X 10 -4

Converting scientific to conventional notation If the exponent is positive, the number 1, so

Converting scientific to conventional notation If the exponent is positive, the number 1, so move the decimal point right. 3. 784 X 105 378400

Converting scientific to conventional notation If the exponent is negative, the number is between

Converting scientific to conventional notation If the exponent is negative, the number is between 0 and 1 so move the decimal point to the left. 2. 75 X 10 -3 0. 00275

Calculating Percent Error What is it Percent ErrorCalculating Percent Error What is it Percent Error
Calculating Percent Error What is it Percent ErrorCalculating Percent Error What is it Percent Error
DENSITY Density and Buoyancy Key Points Density DensityDENSITY Density and Buoyancy Key Points Density Density
Density and error Density Density Compares mass amountDensity and error Density Density Compares mass amount
Density Salinity Temperature Density and Oceans Density isDensity Salinity Temperature Density and Oceans Density is
TOPIC AGAIN TOPIC AGAIN PRETEST Directions Write aTOPIC AGAIN TOPIC AGAIN PRETEST Directions Write a
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Percent Composition What is Percent Composition The percentPercent Composition What is Percent Composition The percent
Percent Proportion Equation Percent of Change Percent ofPercent Proportion Equation Percent of Change Percent of
Empirical molecular percent composition Percent Composition Percent byEmpirical molecular percent composition Percent Composition Percent by
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Percent of Change Vocabulary percent of change percentPercent of Change Vocabulary percent of change percent
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Percent Change Percent Increase Percent Decrease Objective LearnPercent Change Percent Increase Percent Decrease Objective Learn