Unit C: Heat and Temperature
Heat and Temperature:
Topic 1: History of Heat. Topic 1: Tech Assignment - Early Heating Technology Timeline.
Topic 2: Heat affects matter
Topic 3: Sources of Thermal Energy
Topic 4: Technologies that use heat have benefits and costs to society and to the environment.
The Amazing Race - Heat and Temperature Challenge
Modified by Liz Keddy 2013
Originally Designed by Ron Pisoni and Dwayne Unreiner and Assisted by Ray Hoger 2003
Original Link: http://www2.mhcbe.ab.ca/ict/Projects/AmazingRace/amazingRace.htm
You are a participant in the challenge of travelling with “Heat & Temperature Technologies.” In order to win, you must successfully travel from Medicine Hat to Toronto. There will be some challenges along the way for you to complete before you reach your final destination.
Your Mission - Seven challenges must be mastered in order for you to complete your journey.
Please use the handout provided in class to record your teams answers to all seven challenges.
Challenge 1: You are travelling from Medicine Hat to Moose Jaw by “Greyhound Bus.” It is 25 degrees Celsius in the morning, (when the tire was filled with air) and it is supposed to reach a high of 38 degrees Celsius by early afternoon. Around 3:00 pm the bus driver starts to sway back and forth on the highway until finally he screeches to the side of a road. He notices he has a flat tire, however, there is no debris found in or around the tire. Using the particle theory, explain what might have happened! (4 marks)
Challenge 2: Since the bus will take a few hours to repair you are desperately looking for a quicker ride. Out in a farmers field is a young gentleman just about to get into a HOT AIR BALLOON. You ask him for a ride to Moose Jaw.
a. Before you can get in you need to explain how convection works in case you are needed to pilot the balloon. Using the diagram at this Challenge fill in the boxes using the following words; heat source, less dense air particles, more dense air particles.
Challenge 3: The hot air balloon stops in Moose Jaw. You thank the gentleman and go on your way. About 30 minutes later you take a break to take a drink of hot chocolate from your thermos. You start to wonder how a thermos works. Open “howstuffworks - thermos" and explain in a paragraph, in your own words, how a thermos uses conduction, convection and radiation to keep your hot chocolate hot. Also label the diagram of the thermos using the following words; screw top, vacuum, outer shell, contents, silvered glass.
Challenge 4: After you have warmed up from your hot chocolate you are wondering what the temperature outside is. The problem is you do not have a thermometer with you. Use the following site to explain how to make your own thermometer.
Challenge 5: After you have found out the temperature outside you decide to keep walking down the highway where you eventually get picked up by a man going to Winnipeg. Just outside of Winnipeg you come across a huge brush fire. You get out of the car and feel the heat from the fire and start moving away. Explain in two or three sentences how a fire demonstrates all three forms of heat transfer.
Challenge 6: What is the formula to convert degrees Fahrenheit into degrees Celsius, and inches to centimetres.
Challenge 7: After helping the fire department put out the grass fire you decide to hop a train going East. After a long journey it comes to a sudden stop due to a break in the track. You have arrived in Toronto where the temperature is around –11 degrees Celsius. The foreman is unsure of how far to space the rail apart in order to compensate for the expansion and contraction of the rail. Use the information and the chart from the website provided to find the correct distance the foreman needs to space the rail. (be careful, the chart states temperature in degrees Fahrenheit) Show all work.