1. Heat

2. Overview What is it? How do we measure it? Heat and states of matter
Heat and us

3. What ‘is’ it?
Dictionary.com: a nonmechanical energy transfer with reference to a temperature difference between a system and its surroundings or between two parts of the same system. Symbol:  Q
“hot spots” of a house

4. Heat = thermal energy.
The faster molecules move, the more thermal energy...
. . . the hotter something is

5. Planet Temperature Ranges
Mercury:
-183 °C (-300 °F) to 467 °C (872 ° F)
Venus: Avg: ~ °C ( °F)
Mars:
-123 °C (-189°F) to 37 °C (99°F)

6. Earth: -89 °C (-128 °F) to 57 °C (135 °F) avg: 14 °C (57 °F)
Think about it:
Q1: Why does this work for most animals?
Q2: What are 3 things that impact climate on Earth?

7. A1: Plants & animals need liquid H2O

8. A2: Many different things
Distance from sun
Air currents
Earth’s tilt
Seasons
Greenhouse effect

9. Heat and states of matter

10. The North American Wood Frog

11. Intermission: Count how many skaters hit the ice.

12. How do we measure it?
Indirectly
Temperature: measure of the average kinetic energy.
Moving particles can be measured with a thermometer.

13. How do we measure it? Farenheit Celsius Kelvin Absolute Zero
Water freezes at 0°C
Boils at 100°C
Farenheit
Water freezes at 32°F
Boils at 212°F
Kelvin
Water freezes at 273 K
Absolute Zero
-273°C
0 K

14. Heat Transfer
Conduction
Convection
Radiation