.

1. Conduction. What is it again?

2. Conduction. It’s the transmission of heat to
another object.

3. Conduction. It’s the transmission of heat to
another object.
If a hotter object touches a cooler object, the
heat will jump to the cooler object, keeping
it warm and comfortable.

4. Conduction. It’s the transmission of heat to
another object.
If a hotter object touches a cooler object, the
heat will jump to the cooler object, keeping
it warm and comfortable.
Metals (and diamonds) are GOOD
conductors, Non-metals are not so good…

6. What is it?

7. What is it?
Let’s read page 56

8. What is it?
So, convection is the movement of heat
through fluids.

9. What is it?
So, convection is the movement of heat
through fluids.
It is the process that makes hot fluids rise to
the top, and cold fluids fall to the bottom.

10. What is a fluid?
A fluid is a substance that has no fixed
shape.

11. What is a fluid?
A fluid is a substance that has no fixed
shape.
What are two types of fluids?

12. What is a fluid?
A fluid is a substance that has no fixed
shape.
What are two types of fluids?
Liquids and Gases

15. When you heat a teapot full of water, the
fire is at the bottom. The water at the
bottom gets hot and rises to the top.

16. Because the rising heat is going away from
the hot fire, it cools down.
Cooler water will then fall to the bottom
and get hotter.

17. This will go around and around forever
until:
A) _____________?
B) _____________?

18. This will go around and around forever
until:
A) You stop the heat
B) _____________?

19. This will go around and around forever
until:
A) You stop the heat
B) The water evaporates

20. You can watch the movement of
convection with barley seeds.

22. The water that gets hotter expands – gets
bigger.
If it gets bigger, it is less dense.

23. If it gets bigger, it is less dense.
Close together
and small.

24. If it gets bigger, it is less dense.
Far apart
and bigger

25. If they are more spread out, they weigh
less, and rise to the top
Far apart
and bigger

26. If they are more spread out, they weigh
less, and rise to the top
Light and
floating
Heavy and
sinking

27. Let’s read page 57

28. So we can see convection in every day life.
But you can also see it happen in many
other places:

29. http://www.youtube.com/watch?v=_
OUM7x7iT38#t=7
Here you can see a fluid heating and
cooling, rising and falling, in high speed.

30. http://www.youtube.com/watch?v=a
Lvk2cbsvzM
Here you can even see convection Moving
the skies and the clouds

31. http://www.youtube.com/watch?v=a
Lvk2cbsvzM
The warmer clouds are rising upwards,
and then spreading out on the top. They
cool down and fall below again.

32. http://www.youtube.com/watch?v=p
0dWF_3PYh4
Here you can even see convection

33. http://www.youtube.com/watch?v=p
0dWF_3PYh4
The lava inside the earth is so hot, it rises
upwards. As it spreads across the top, it
pushes the land around, cools down, and
falls below again. Just like the clouds!

34. Draw a three-step process of convection
from daily life. Think about these:

35. 1 – Heat the
fluid
1

36. 2 – Fluid
rises up
2

37. 3 – Fluid
falls down
3

38. 3 – Fluid
falls down
3
Draw a
picture here
Write the
sentence here