Unit c - 2.2 heat vs temperature
- 1. 2.2 Heat and Temperature
- 2. What is Temperature Really? • It is all around us – when we wake up in the morning, in the classroom, outside, and it goes on ▫ Ex. Weather Channel • We use many different tools to measure temperature.
- 3. Thermometer • Many different kinds and uses…main examples: Weather outside Body temperature • Here are some commonly used ones today:
- 4. Galileo’s Thermometer • glass vials float to the top or sink to bottom of tube based on temperature of water in tube
- 5. Mercury Thermometer • The liquid in the tubes goes up and down based on temperature
- 6. Infrared Thermometer • Measures body temperature of a person using a little tip inserted into the ear
- 7. Heat Energy and Temperature • Heat energy transfers from HOT substances to COLD ones….Always. • When we take the temperature of anything we are measure the amount of heat energy. • The higher the heat energy the higher the temperature • Ex. Temperature on a winter day
- 9. Kinetic Energy and Thermal Energy • Kinetic – Amount of movement of the particles Higher temperature more kinetic energy • Thermal – Total amount of kinetic energy caused by all particle movement
- 10. Heat • Energy that transfers from one substance to another • Ex. Water being boiled to make tea Heat is being transferred to make the water hotter • Ex. Chocolate being melted on the stove Heat from stove is transferred to the colder chocolate
- 11. • When 40C water mixes with 60C water the result is…………50C water!!! HEAT TRANSFER
- 12. Heat Transfer • When two substances transfer heat without any electronic assistance they will warm up/ cool down equally. • Ex. 40C water mixed with 60C water = 50C water ▫ 40C + 10C = 50 60C – 10C = 50C ▫ BOTH GAIN/LOSE 10C of temperature
- 13. Difference Between Them • Thermal Energy – TOTAL kinetic energy • Heat – the energy that transfers from a particles with higher movement to lower movement (kinetic energy) • Temperature is just a measurement of kinetic energy (hot or cold)
- 14. • This leads us to the next section of Conduction, Convection, and Radiation. ▫ We will be building our own thermoses to protect and ice cube from heat ▫ More details to come!!!