1. November 3, 2017
Warm-Up: Complete the crossword on the back of the Bill Nye worksheet
Place your work form yesterday in the center of the table – didn’t get one? I’ll hand them out after I take attendance.
HOMEWORK: Get an extra hour of sleep Saturday night!

2. November 3, 2017 Warm-Up: Complete worksheet
Take out notebook for notes – write the following terms and leave a line in-between each word for the definition:
1)Thermal energy, 2) temperature, 3) heat transfer, 4) equilibrium, 5) temperature scales, 6) absolute zero, 7) thermal expansion, 8) conductors, 9) insulators 10) radiation, 11) conduction, 12) convection

3. What is heat?
What is temperature?

4. Thermal Energy, Temperature and Heat Transfer
The terms heat and temperature are often confused by people…
Thermal energy is the TOTAL kinetic energy of the particles that make up a substance
Temperature is a measure of the average kinetic energy in an object
Heat transfer is how thermal energy moves from an object of higher temperature to an object of lower temperature

5. Remember…
Heat likes to go from high to low until it has nowhere else to go!
We call that EQUILIBRIUM

6. …something which has a higher temperature than another does not necessarily contain more heat energy…

7. Coffee Pot or the North Sea
Which is hotter? (temperature)
Which contains more energy? (heat)
You need to be able to explain your answer

8. Iceberg or a glass of water
Which is hotter? (temperature)
Which contains more energy? (heat)
You must be prepared to explain your answer

9. Temperature
Temperature is a measure of the average kinetic energy of the particles of a substance.
Fahrenheit, Celsius, and Kelvin are three temperature scales.
Absolute zero (0 K, or –273ºC) is the lowest possible temperature.
Thermal expansion is the increase in volume of a substance due to an increase in temperature.
A thermostat works because of the thermal expansion of a bimetallic strip.

10. Heat
Heat is energy transferred between objects that are at different temperatures.
Thermal energy is the total kinetic energy of the particles that make up a substance.
Thermal energy will always be transferred from higher to lower temperature.
Transfer of thermal energy ends when two objects that are in contact are at the same temperature.

11. Conductors and Insulators
Thermal conductors allow heat to transfer easily
Examples include metals such as iron, copper, or aluminum
Thermal insulators do not allow heat to transfer easily
Examples include plastic, wood, and glass

12. Heat Transfer
Conduction, convection, and radiation are three ways thermal energy is transferred.

13. Radiation The transfer of energy as electromagnetic waves
Does NOT require a medium and CAN occur in a vacuum
Example: heat radiating from the sun or a fire

14. Conduction The transfer of energy through direct conduction
Can happen in a solid or a liquid, but the molecules in a gas are too far apart for conduction to work well

15. Convection
The transfer of energy by the movement of a fluid (liquid or gas)
Heated molecules rise and cooler molecules sink
This creates a circular pattern called a convection current

17. Question 1
Earth receives energy from the sun by
A. Convection
B. Conduction
C. Radiation
D. Temperature

18. Question 1
Earth receives energy from the sun by
A. Convection
B. Conduction
C. Radiation
D. Temperature

19. Question 2
You have 4 containers of water. The water in each is the same temperature. Which has the greatest thermal energy?
A. 5 mL
B. 10 mL
C. 15 mL
D. 50 mL

20. Question 2
You have 4 containers of water. The water in each is the same temperature. Which has the greatest thermal energy?
A. 5 mL
B. 10 mL
C. 15 mL
D. 50 mL

21. Question 3
The illustration shows the movement of thermal energy from a hot liquid to a metal spoon. What method of heat transfer is occurring?
A. Conduction
B. Convection
C. Radiation
D. Temperature

22. Question 3
The illustration shows the movement of thermal energy from a hot liquid to a metal spoon. What method of heat transfer is occurring?
A. Conduction
B. Convection
C. Radiation
D. Temperature

23. Question 4 In gases, heat transfer often occurs by A. Conduction
B. Convection
C. Radiation
D. Thermal energy

24. Question 4 In gases, heat transfer often occurs by A. Conduction
B. Convection
C. Radiation
D. Thermal energy

25. Penguin Convection!

26. Specific Heat
Specific heat is the amount of energy needed to change the temperature of 1 kg of a substance by 1ºC.
Energy transferred by heat cannot be measured directly. It must be calculated using specific heat, mass, and change in temperature.

27. Specific Heat Formula Q = Heat in Joules M = Mass in grams
C = Specific Heat Capacity in Joules/goC
T = Temperature Change in OC

28. Example: How much energy is needed to heat a cup of water to make tea?
Heat (J) = 4,184 J/kgOC x 0.2 kg x 55OC
4,184 x 0.2 x 55 = 46,024 Joules
Kilograms and Celsius degrees cancel out!

29. August 23, 2017 Warm-Up: Complete the worksheet
Answer in complete sentences
HOMEWORK: Read chapter 3, section 2. USA Test Prep due Friday.

30. States of Matter Poster
Four boxes for the 4 states of matter: solid, liquid, gas, plasma
Draw arrows to and from each box for phase changes
In each box have a representation of the particle arrangement
Describe shape and volume