1. A Journey to the Microscopic World

2. What are Atoms?
Atoms are very tiny particles that form the building blocks for all matter

3. What Does a Microscope Do?
A microscope is used to look at very tiny objects by making them appear larger
It is sort of like a telescope or binoculars

4. Just What Size Is an Atom?
Let’s do a little exercise!!
What you’ll need
A strip of paper
A pair of scissors
What to do
Take your strip of paper and cut it into equal halves
Cut one of the remaining pieces of paper into equal halves
Repeat!

5. Just What Size Is an Atom?
Cut 1
Pocket
Hand
14 cm

6. Just What Size Is an Atom?
Cut 2
Finger
Ear
7.0 cm

7. Just What Size Is an Atom?
Cut 3
Watch
Mushroom
Eye
3.5 cm

8. Just What Size Is an Atom?
Cut 4
Keyboard Key
Ring
Insect
1.75 cm

9. Just What Size Is an Atom?
Cut 5
Keep going … atoms are much smaller!
0.88 cm

10. Just What Size Is an Atom?
Cut 6
Tiny seeds on top of a Whopper bun
0.44 cm

11. Just What Size Is an Atom?
Cut 7
Keep going … atoms are still much smaller!
0.22 cm

12. Just What Size Is an Atom?
Cut 8
Thread
1.0 mm

13. Just What Size Is an Atom?
Cut 9
It’s too difficult to keep cutting!
Let’s just pretend from now on
0.5 mm

14. Just What Size Is an Atom?
Cut 10
The size of one tiny light (pixel) on a computer screen
0.25 mm

15. Just What Size Is an Atom?
Cut 11
Wow, I didn’t think anything was this small!
0.125 mm

16. Just What Size Is an Atom?
Cut 12
A piece of hair
0.06 mm

17. Just What Size Is an Atom?
Cut 13
Our meter has disappeared!
???
0.03 mm

18. Just What Size Is an Atom?
Cut 14
The width of paper
0.015 mm

19. Just What Size Is an Atom?
Cut 15
We’re not done yet keep cutting!
0.007 mm

20. Just What Size Is an Atom?
Cut 16
Bacteria
0.003 mm

21. Just What Size Is an Atom?
Cut 17
We’re not done yet keep cutting! mm

22. Just What Size Is an Atom?
Cut 18
Water filter
1.0 micron

23. Just What Size Is an Atom?
Cut 19
We’re not done yet keep cutting!
0.5 micron

24. Just What Size Is an Atom?
Cut 20
Tiny wires inside a computer chip
0.25 micron

25. Just What Size Is an Atom?
Cut 21
We’re not done yet keep cutting!
0.13 micron

26. Just What Size Is an Atom?
Cut 22
Virus
0.07 micron

27. Just What Size Is an Atom?
Cut 23
We’re not done yet keep cutting!
0.03 micron

28. Just What Size Is an Atom?
Cut 24
We’re not done yet keep cutting!
0.015 micron

29. Just What Size Is an Atom?
Cut 25
We’re not done yet keep cutting!
0.008 micron

30. Just What Size Is an Atom?
Cut 26
Almost there
5 Cuts left
0.004 micron

31. Just What Size Is an Atom?
Cut 27
Almost there
4 Cuts left
0.002 micron

32. Just What Size Is an Atom?
Cut 28
Almost there
3 Cuts left
0.001 micron

33. Just What Size Is an Atom?
Cut 29
Almost there
2 Cuts left
micron

34. Just What Size Is an Atom?
Cut 30
Almost there
1 Cut left
micron

35. Just What Size Is an Atom?
Cut 31 H Ca He
Atoms !!! Cl C Na O N
micron

36. Periodic Table

37. How Many Atoms Are In A Person?
Around …
8,000,000,000,000,000,000,000,000,000
that’s …
eight million-million-million-million-thousand atoms
Wow!

38. Molecules are very small objects that are made up of connected atoms
What are Molecules?
Molecules are very small objects that are made up of connected atoms

39. What Do Molecules Look Like?

40. Water H H O
H2O

41. Air
Nitrogen N
Oxygen O

42. Sugar

43. Salt

44. Plastic

45. DNA

46. It depends on whether they are in a solid, liquid, or gas
Do Molecules Move?
Yes, they sure do!
How do they move?
It depends on whether they are in a solid, liquid, or gas