1. The Working Cell: Energy from Sunlight
Chapter 8
The Working Cell: Energy from Sunlight

2. Autotrophs
Organisms that can make their own food (glucose) by photosynthesis

3. can turn inorganic raw materials into ORGANIC compounds
Autotrophs
(CO2 & H2O)
can turn inorganic raw materials into ORGANIC compounds
(C6H12O6)

4. Why are heterotrophs dependent on autotrophs?
For FOOD (glucose) and OXYGEN

5. Plant Cells vs. Animal Cells

6. Animal Tissue Examples

7. Animal Organs
Name 6 organs…

8. Name 3 animal organ systems…..

9. Dermal – Protection (outer covering)
Plant Tissues
Dermal – Protection (outer covering)
Vascular – Transports Water and Nutrients
Ground – Photosynthesis, storage and support

12. Roots – absorb water and minerals Stems – support leaves
Plant Organs
Roots – absorb water and minerals
Stems – support leaves
Leaves – photosynthesis
Flowers - reproduction

13. Roots absorb water & soil nutrients

14. Stems display leaves & transport food and water

15. Leaves are the site of photosynthesis

16. Flowers are reproductive organs

17. A. Mesophyll (Ground tissue)
Leaf Cross Section
A. Mesophyll (Ground tissue) B D
B. Cuticle A C
C. Chloroplasts
D. Epidermis (Dermal Tissue ) E G F
E. Vascular Tissue
F. Stomate (opening)
G. Guard Cell

18. 8.1
Photosynthesis
uses light energy to
make food.

19. Photo =
Synthesis =
Light
Building Process

20. Photosynthesis

21. Leaves Which part of a plant would contain the most number of
chloroplasts?
Leaves

22. Chloroplast Organelle where photosynthesis takes place
Found in the mesophyll layer of leaf

23. Leaf Cross Section

24. Pigment (protein) that gives the chloroplast its green color
Chlorophyll
Pigment (protein) that gives the chloroplast its green color

25. Cells that form an opening in the surface of the leaf
Guard Cells
Cells that form an opening in the surface of the leaf

26. Opening Formed by 2 guard cells
Stomata
Opening Formed by 2 guard cells

27. Site of gas and water exchange with the environment
Stomata
Site of gas and water exchange with the environment
HOMEOSTASIS!

28. chloroplasts
guard cells
stomata
nucleus

29. Stomata
Stomata
Guard Cell
Guard Cell

30. Stomate
Guard
cells

31. Overview of Stomata Movie

32. Overview of Photosynthesis:
Chloroplasts take in carbon dioxide and water to make glucose & oxygen.

33. Fill in:
reactants on the left
products on the right

34. C6H12O6 CO2 H2O O2 Light Energy photosynthesis Light Energy Reactants
Products
Light
Energy
C6H12O6
CO2
H2O O2

35. Overall chemical equation for photosyntheis:

36. + +
6CO2+ 6H2OC6H12O6 +6O2

37. 8.2
Light Energy

38. Electromagnetic Spectrum
The range of types of electromagnetic energy.
Radio waves Gamma rays

40. What is light?
ENERGY!

41. What is the main source of light energy?

42. Visible Light
The electromagnetic waves that we can see

43. The Light Spectrum (R O Y G B I V ) Red Orange Yellow Green Blue
Indigo
Violet
(R O Y G B I V )

44. White light is actually a combination of
ALL the colors

45. To see an object, light energy must enter our
eyes

46. Objects appear as different colors because…
They reflect different wavelengths

47. Examples:
A red apple REFLECTS red light into our eyes
A yellow lemon reflects yellow light; etc.

48. 3 things can happen when light strikes an object:
5. Pigments & Color
3 things can happen when light strikes an object:

49. 1. It can be REFLECTED

50. 2. or TRANSMITTED

51. 3. or ABSORBED

53. 6. Identifying Chloroplast Pigments
Paper chromatography separation of pigments
Class activity…

54. chromatography animation

55. Data Table of Light Absorbance
Use the data table to make a bar graph of the absorption of light by plants.
Data Table of Light Absorbance
Color
Absorbed (%)
Red 80
Orange 15
Yellow 10
Green 5
blue 90
R O Y G B

56. Objects ABSORB the colors that they do NOT reflect….
So what colors of light do green plants absorb the most???

57. link to online plant activities

58. The Plant Game
Class activity