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# 6th grade ch. 2 sec. 2 heat transfer

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### 6th grade ch. 2 sec. 2 heat transfer

1. 1. Ch. 2 Sec. 2 Heat Transfer
2. 2. measuring temperature
3. 3. <ul><li>total energy of motion in the molecules of a substance </li></ul>
4. 4. temperature <ul><li>average amount of energy of motion of each molecule of a substance </li></ul><ul><ul><li>measure of hot or cold </li></ul></ul><ul><ul><li>measured w/ thermometer </li></ul></ul>
5. 5. Temperature <ul><li>measured in units called degrees </li></ul>32 o F 0 o C 212 o F 100 o C Fahrenheit scale Celsius scale Temp. of water
6. 6. <ul><li>energy transferred from hotter object  cooler object </li></ul>heat
7. 7. How Heat is Transferred :
8. 8. <ul><li>1. radiation </li></ul><ul><ul><li>direct transfer of energy </li></ul></ul><ul><ul><li>transfers heat from Sun to Earth </li></ul></ul>
9. 10. 2. conduction <ul><li>direct transfer of heat from one substance to another substance that is touching </li></ul>
10. 12. 3. convection <ul><li>transfer of heat by movement of a fluid </li></ul><ul><li>causes most heating of troposphere </li></ul>
11. 16. Convection
12. 17. <ul><li>Problem : Does altitude affect air temperature? </li></ul><ul><li>Research: measure in C or F, w/ thermometer, freezing & boiling point of water, thermal energy </li></ul><ul><li>Hypothesis: If a thermometer is placed on the ground, then it will have a higher temperature than a thermometer in a tree because most sunlight is absorbed by the ground. Therefore, the lower the altitude the higher the temperature. </li></ul><ul><li>Procedure: </li></ul><ul><li>Place 3 thermometers in different areas: </li></ul><ul><li>On the ground </li></ul><ul><li>On the bushes </li></ul><ul><li>On top of the playground </li></ul><ul><li>2. Make sure all the thermometers are in the sun </li></ul><ul><li>3. Measure the temperatures of each every 5 minutes. </li></ul><ul><li>4. Find the average temperature of each thermometer. </li></ul>
13. 18. <ul><li>Problem : Does altitude affect air temperature? </li></ul>15 min. 10 min. 5 min. Average of 3 times Time 1:15 pm- C 1:15 pm- C 1:15 pm- C Location 3 (on top of playground) Location 2 (on x bushes) Location 1 xxxxx (on ground)