1. Carbon is the most important element in living things because it can form bonds with itself and other elements to create long chains and rings which are the building blocks of biological molecules like DNA, sugars, fats and proteins. 2. Key molecules in living things include DNA, sugars and fats which are large due to carbon chains, while water and salt are smaller molecules. 3. Carbon, hydrogen, oxygen, nitrogen, phosphorus and sulfur are the six main elements that make up molecules in living things.

1. CST Review
Carbon & Life
Molecules

2. CST Review
Carbon and
Life Molecules

3. Copyright Richards 2009
Class Work

4. Copyright Richards 2009
Class Work
Study

5. BrainPop
Crystals
Brain Pop
Click picture to go to this BrainPop

6. BrainPop
Body Chemistry
Brain Pop
Click picture to go to this BrainPop

7. CST Review
42

8. Why is carbon important to living things?
I. Carbon is the most important
element in living things because
of its special properties.

9. Why is carbon important to living things?
A. Carbon can form bonds
with itself.

10. Why is carbon important to living things?
B. Carbon can form molecules
with long chains of atoms.

11. Why is carbon important to living things?
C. Carbon can form molecules
made of rings of atoms.

12. CST Review
42

13. CST Review
42

14. CST Review
43

15. Carbon: Chemistry of Life
C. Many molecules found in living
things (like DNA, sugars, fats, and
proteins) are LARGE molecules
containing chains of carbon.
glucose saturated fat
DNA

16. Carbon: Chemistry of Life
D. Salt (NaCl) and water (H2O) are
small molecules in living things.

17. Molecules in Living Things Thinking Map
water
salt

18. Hands on Activity
6C 12H C6H12O6
6 carbon 12 hydrogen 6 oxygen 1 glucose
atoms atoms atoms sugar
molecule
=+
Making Molecular Models of Chemical Equations:
1. Write the reaction below.
2. Using the legend, make a model of this reaction:
6O
+

19. glucose
Hands on Activity
6C 12H C6H12O6
Making Molecular Models of Chemical Equations:
6O
O
O
O
O
H
O
O
C
C
C C
C
C
H
H
H
H H
H
H
H

20. CST Review
43

21. CST Review
43

22. CST Review
44

23. Carbon: Chemistry of Life
I. Six elements form most
molecules in living things:
Phosphorus
Nitrogen
Carbon
Hydrogen
Oxygen
Sulfur
Please Never
Call Her On
Sunday

24. CST Review
44

25. CST Review
44

26. glucose
saturated fat
DNA
Life
Molecules

27. Think-Group-Share
What are three special
properties of carbon?

28. Think-Group-Share
What are three special
properties of carbon?
Carbon can bond to itself.
 Carbon can form long chains.
 Carbon can form rings.

29. Why is carbon important to living things?
I. Carbon is the most important
element in living things because
of its special properties.

30. Why is carbon important to living things?
A. Carbon can form bonds
with itself.

31. Why is carbon important to living things?
B. Carbon can form molecules
with long chains of atoms.

32. Why is carbon important to living things?
C. Carbon can form molecules
made of rings of atoms.

33. Think-Write-Group-Share
Which element is NOT in living
things.
 A. oxygen
 B. chlorine
 C. hydrogen
 D. phosphorus

34. Think-Write-Group-Share
Which element is NOT in living
things.
 A. oxygen
 B. chlorine
 C. hydrogen
 D. phosphorus

35. III. Six elements form most
molecules in living things:
Phosphorus
Nitrogen
Carbon
Hydrogen
Oxygen
Sulfur
Please Never
Call Her On
Sunday
What can I use to help me remember?

36. Think-Write-Group-Share
Which of the following is a small
molecule in living things.
 A. DNA
 B. fat
 C. water
 D. protein

37. Think-Write-Group-Share
Which of the following is a small
molecule in living things.
 A. DNA
 B. fat
 C. water
 D. protein

38. Molecules in Living Things Thinking Map
water
salt

39. Think-Write-Group-Share
Which of the following are large
molecules in living things.
 A. salt
 B. fat
 C. water
 D. protein

40. Think-Write-Group-Share
Which of the following are large
molecules in living things.
 A. salt
 B. fat
 C. water
 D. protein

41. Molecules in Living Things Thinking Map
DNA
fats
proteins
sugars
carbohydrates

42. diamonds
salt
graphite
Crystal
Molecules

43. 1. Salt crystals
have alternating
atoms of sodium
and chlorine.
Crystal Molecules

44. B. Diamonds have
carbon atoms
arranged in
alternating hexagon
patterns.
Crystal Molecules

45. Copyright Richards 2009
Structure of Crystal
Molecules Thinking
Map
Page 51
salt
Salt crystals are made of alternating
sodium and chlorine atoms.
diamond
Diamonds are made of hexagons of
carbon atoms.

46. Think-Write-Group-Share
Which of these molecules form
a crystal?
 A. carbon dioxide
 B. salt
 C. water
 D. diamonds

47. Think-Write-Group-Share
Which of these molecules form
a crystal?
 A. carbon dioxide
 B. salt
 C. water
 D. diamonds

48. A. The atoms in
crystal molecules
are arranged in
repeating patterns.
Crystal Molecules

49. Think-Write-Group-Share
How are atoms arranged
in crystal molecules?
 A. randomly
 B. in repeating patterns
 C. in spirals

50. Think-Write-Group-Share
How are atoms arranged
in crystal molecules?
 A. randomly
 B. in repeating patterns
 C. in spirals

51. B. Diamonds have
carbon atoms
arranged in
alternating hexagon
rings.
Crystal Molecules

52. Think-Write-Group-Share
How are carbon atoms
arranged in a diamond?
 A. hexagonal rings
 B. long chains
 C. spirals
D. alternating rows

53. Think-Write-Group-Share
How are carbon atoms
arranged in a diamond?
 A. hexagonal rings
 B. long chains
 C. spirals
D. alternating rows

54. Crystal Molecules
2. The alternating
pattern of sodium
and chlorine atoms
gives salt the shape
of cubes.

55. Think-Write-Group-Share
How are atoms arranged in a salt
molecule?
 A. rings of alternating chlorine and
sodium atoms.
 B. chains of repeating chlorine atoms
 C. a cube of alternating sodium and
chlorine atoms.

56. Think-Write-Group-Share
How are atoms arranged in a salt
molecule?
 A. rings of alternating chlorine and
sodium atoms.
 B. chains of repeating chlorine atoms
 C. a cube of alternating sodium
and chlorine atoms.

57. Crystal Molecules
II. The repeating groups of
atoms in crystals form a
crisscross net called a lattice.

58. Think-Write-Group-Share
In crystals repeating
patterns of atoms form
 A. a chain
 B. a ring
 C. a lattice

59. Think-Write-Group-Share
In crystals repeating
patterns of atoms form
 A. a chain
 B. a ring
 C. a lattice