Chapter 4 Temperature describes how hot or cold an object is.
Review questions from Nov 27
1 State two advantages of using a thermocouple instead of a laboratory thermometer? - Reads extreme temperatures - More durable 2 State two differences between a thermoscope and a thermometer? - A Thermometer is calibrated but a thermoscope is not - In a thermometer the liquid expands as it warms but in a thermoscope the air in the upper bulb expands and contracts causing the liquid the fall and rise 3 Define Temperature. - measure of how hot or cold an object is. 4 If the temperature in a freezer was -6 C, what might happen to the food inside? Why? - Not all substances in a freezer freeze at 0. Some things like ice cream for example needs to be colder and will last longer closer to -20. 5 Describe Galileo’s first Thermoscope. What liquid was used in the Thermoscope? heating of upper bulb (air) causes the air to expand and push the liquid down. The opposite happens when the upper bulb is cooled. The original thermoscope had water as a liquid. 6 What is the difference between the Celsius and Kelvin scale of temperatures? - Celcius is based on boiling and freezing point of water (o - 100). Fahrenheit is based on a water/ice/salt mixture as 0 and human body temperature as 100. The Kelvin scale does not use degrees (just Kelvins) and set 0 as absolute zero or the coldest possible temperature. 7 Explain how a Thermogram is made. - Infrared Radiation from heat is converted to colours that can be intrepreted as temperature differences. 8 Why was the Celsius scale named after Anders Celsius even though many others used 0 and 100 to calibrate thermometers? - Celcius was the first to calibrate using standard atmospheric conditions at sea level. 9 Why was -273.15 C chosen for 0 on the Kelvin temperature scale? - Is was absolute zero. The theoretical temperature where particles stop moving. 10 Bimetalic strips and thermocouples are made from two different metals. What properties of the metals allow these devices to measure temperature? - Different metals transfer heat at different rates and expand different amounts. Note: There won't be any Scientific Literacy or graphing items on this quiz. |
Notes
Below is a Practice Crossword Puzzle
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