1. What is Hot? What is Cold?

2. Today’s Points: - Temperature is a measurement of the average energy of moving particles in a sold, liquid or gas.
Heat is the thermal energy transferred from an area of higher temperature to an area of lower temperature.
We use a thermometer to measure the temperature of solids, liquids or gas.
Heat transfer can raise the temperature of a solid, liquid or gas.

3. To keep buildings and rooms warm and comfortable, we need to produce huge amounts of heat!

4. 2. 1. 4. 3.

5. So… You are waiting for a bus on a cold day, so you try to keep warm by moving around.

6. The more you move the warmer you become.

7. You have an amazing and filling lunch.

8. How does this food keep you warm?

9. But it’s not enough energy to keep you warm.

10. So you decide to BUNDLE up!

12. Fossil Fuels – oil, natural gas, or coal.

13. If your home is heated with electricity, the electricity comes from a process that involves burning fossil fuels.

16. Non-Renewable Resource

17. Renewable Energy Resource

18. Renewable Resource: One that can be reused or replaced.

22. “Waste” Heat Not all heat is produced on purpose.
When you turn on a lamp, you put your hand close to the bulb you can feel that heat.
The heat from the bulb is considered “waste” heat because we do not need it.

23. “Waste” Heat
Heat is produced in all energy transformations whether it is wanted or not

24. “Waste” Heat
Some heat is always produced when energy is converted!

26. What is temperature actually measuring?

27. To understand temperature…
Think about how matter is made up of particles.
These particles are constantly moving.
There is energy because of their motion.

28. But not all particles move at the same speed, some are faster than others.

29. Temperature: Is the measurement of the average energy of all particles in a solid, liquid or gas.

32. Thermal Energy: is the total energy of all the moving particles in a solid, liquid or gas.
To Understand Heat:
Temperature, Thermal Energy, Heat

34. Transferring Thermal Energy
When we “heat” water, we mean that we are transferring energy to all the particles of water.
This means we are increasing the total energy of the water particles.
Motion of each particle increases, meaning temperature increases.

35. When you touch the cup with the hot tea, the cup has become hotter
This means thermal energy has been transferred to the cup
The amount of energy transferred to the cup
Is called “heat”

36. Heat is the thermal energy transferred from a solid, liquid or a gas at a higher temperature to a solid, liquid or gas at a lower temperature.

37. Page 293 #1-8

38. The Great Ice Race Experiment
Your challenge it to melt an ice cube as fast as you can. 1. Think about how you might melt your ice cube. 2. Share your ideas Your teacher will give you an ice cube Set the timer. The race is on, Go! 5. As a class: Which method worked the best? Why do you think this was the case?