Slide 1

WELCOME BACK MINIONS!!! Time to get to work! Slide 2 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. Slide 3 HOT? COLD? Is there a HOT or a COLD in science? How do we measure HOT and COLD? Slide 4 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. Slide 5 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. Slide 6 MEASUREMENT Three Temperature Scales Fahrenheit Celcius Kelvin Slide 7 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". Slide 8 CELSIUS Anders Celsius The unit was known until 1948 as "centigrade" from the Latin centum translated as 100 and gradus translated as "steps". Two different points 0 Celsius is the freezing point of water 100 Celsius is the boiling point of water Slide 9 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) Slide 10 MATH TIME!!! Slide 11 WHAT IS THE WEATHER LIKE THIS WEEK? Weather for the week ahead Convert to Fahrenheit! Slide 12 ANSWER! Oh! That is the weather for this week! Slide 13 HMMM What would the temperature be in Kelvin? Slide 14 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? Celsius Which scale is based off of the freezing of Brine? Fahrenheit Slide 15 HOMEWORK!!! Read Chapter 14, section 1 (Pages 472-477) Make sure you have the vocabulary as well!