slide1 l.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
UNIT THREE: Matter, Energy, and Earth PowerPoint Presentation
Download Presentation
UNIT THREE: Matter, Energy, and Earth

Loading in 2 Seconds...

play fullscreen
1 / 18

UNIT THREE: Matter, Energy, and Earth - PowerPoint PPT Presentation


  • 125 Views
  • Uploaded on

UNIT THREE: Matter, Energy, and Earth. Chapter 8 Matter and Temperature Chapter 9 Heat Chapter 10 Properties of Matter Chapter 11 Earth’s Atmosphere and Weather. Chapter Eight: Matter and Temperature. 8.1 The Nature of Matter 8.2 Temperature 8.3 The Phases of Matter.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'UNIT THREE: Matter, Energy, and Earth' - ophrah


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
unit three matter energy and earth
UNIT THREE: Matter, Energy, and Earth
  • Chapter 8 Matter and Temperature
  • Chapter 9 Heat
  • Chapter 10 Properties of Matter
  • Chapter 11 Earth’s Atmosphere and Weather
chapter eight matter and temperature
Chapter Eight: Matter and Temperature
  • 8.1 The Nature of Matter
  • 8.2 Temperature
  • 8.3 The Phases of Matter
chapter 8 2 learning goals
Chapter 8.2 Learning Goals
  • Define temperature in terms of the motion of atoms and molecules.
  • Convert among Fahrenheit, Celsius, and Kelvin scales.
  • Describe the relationship between thermal energy and temperature.
8 2 temperature
8.2 Temperature
  • There are two common temperature scales.
  • On the Fahrenheitscale, water freezes at 32 degrees and boils at 212 degrees.
  • The Celsius scale divides the interval between the freezing and boiling points of water into 100 degrees.
solving problems
Solving Problems

A friend in Paris sends you a recipe for a cake. The French recipe says to bake the cake at a temperature of 200 °C for 45 minutes.

At what temperature should you set your oven, which uses the Fahrenheit scale?

solving problems10
Solving Problems
  • Looking for:
    • …temperature in degrees Fahrenheit
  • Given:
    • …temperature 200 C
  • Relationships:
    • TF = 9/5 TC + 32
  • Solution
    • TF = (9/5)(200 °C) + 32 = 392 °F
8 2 what temperature really is
8.2 What temperature really is
  • Atoms are in constant motion, even in a solid object.
  • The back-and-forth jiggling of atoms is caused by thermal energy, which is a kind of kinetic energy.
8 2 what temperature really is12
8.2 What temperature really is
  • Temperature measures the kinetic energy per molecule due to random motion.
8 2 thermometers
8.2 Thermometers
  • A thermometer is an instrument that measures the exact temperature.
  • Most thermometers contain either a silvery fluid (mercury) or a red fluid, which is alcohol containing a small amount of red dye.
8 2 how a thermometer works
8.2 How a thermometer works
  • The volume of alcohol in a thermometer contains huge numbers of alcohol molecules.
  • As temperature increases, the alcohol molecules move faster and bounce off each other.
  • The liquid alcohol expands and takes up more space in the thermometer.
8 2 measuring temperature
8.2 Measuring temperature
  • A thermistoris a device that changes its electrical resistance as the temperature changes.
  • Some digital thermometers sense temperature by measuring the resistance of electrons passing through wire.
8 2 liquid crystal thermometers
8.2 Liquid-crystal thermometers
  • Some thermometers contain liquid crystals that change color based on temperature.
  • As temperature increases, the molecules of the liquid crystal bump into each other more and more.
  • This causes a change in the structure of the crystals, which in turn affects their color.
8 2 absolute zero
8.2 Absolute zero
  • Absolute zero is -273°C.
  • You cannot have a temperature lower than absolute zero.
  • Think of absolute zero as the temperature at which atoms are “frozen.”
8 2 converting to kelvin
8.2 Converting to Kelvin
  • The Kelvintemperature scale is useful in science because it starts at absolute zero.
  • To convert from Celsius to Kelvin, you add 273 to the temperature in Celsius.