Welcome Back Minions!!!
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Transcript of Welcome Back Minions!!!
WELCOME BACK MINIONS!!!Time to get to work!
HOT… COLD… ALL RELATIVE TO ME…
• Tell me about how the weather FEELS as of late…
• Tell me about the hottest day you remember.
• Tell me about the coldest day you remember.
HOT? COLD?• Is there a “HOT” or a “COLD” in science?
• How do we measure “HOT” and “COLD”?
TEMPERATURE!• What is “Temperature”?
• A measure of the average kinetic energy of the individual particles in matter.
• Matter is made of particles always moving. The faster they move, the more kinetic energy there is, thus the greater the temperature will be.
• Since we cannot measure the kinetic energy of EVERY SINGLE PARTICLE… We take a sample and find the “average”. This is Temperature.
HOW TO MEASURE TEMPERATURE…
• Thermometer!• Liquid in a glass tube.
• The tube is heated, this heats the liquid inside, the liquid expands thus it moves up the tube.
• The opposite is true when it is a lower temperature.
MEASUREMENT…• Three Temperature Scales
• Fahrenheit• Celcius• Kelvin
FAHRENHEIT…• Daniel Gabriel Fahrenheit• According to an article Fahrenheit
wrote in 1724, he based his scale on three reference points of temperature. • he used a mixture of ice, water, and
ammonium chloride, a salt, that stable temperature was defined as 0 °F.
• The second point, at 32 degrees, was a mixture of ice and water without the ammonium chloride at a 1:1 ratio.
• The third point, 96 degrees, was approximately the human body temperature, then called "blood-heat".
CELCIUS…• Anders Celcius• The unit was known until 1948 as
"centigrade" from the Latin centum translated as 100 and gradus translated as "steps".• Two different points
• 0° Celcius is the freezing point of water• 100° Celcius is the boiling point of water
KELVIN• William Thomson, 1st Baron Kelvin
• He wrote:
• “…the need for a scale whereby "infinite cold"“.
• This is absolute zero. • (Point where matter stops moving)
REVIEW• What is temperature?
• A measure of the average kinetic energy of the individual particles in matter.
• What is used to measure temperature?• Thermometer
• Which scale is based off of “Absolute zero”?• Kelvin
• Which scale is based off of “Water Freezing”?• Celcius
• Which scale is based off of the freezing of “Brine”?• Fahrenheit
HOMEWORK!!!• Read Chapter 14, section 1
• (Pages 472-477)• Make sure you have the vocabulary as well!