The document discusses photosynthesis and provides learning objectives about explaining the process of photosynthesis, identifying the reactants and products, explaining which reactions are light dependent and independent, and why many plants appear green. It then provides more details about photosynthesis, including that it converts light energy to chemical energy, the sun is the original energy source for most life on Earth, the reactants are carbon dioxide and water and the products are glucose and oxygen, and plants appear green because chlorophyll absorbs all colors except green.

1. PHOTOSYNTHESIS
GROUP 4
Light Energy and Plants

2. Learning Objectives
• By the end of this lesson, students should be able to:
-explain that the process of photosynthesis converts light
energy to chemical energy.
- explain that the sun is the original energy source for most
life on earth.
-identify the reactants and products of photosynthesis.
-explain which reactions in photosynthesis are light
dependent which
are light independent.
-explain why many plants appear green to us here on
earth.
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3. Colors/Visible Light
S8P4. Students will explore the wave nature of sound and
electromagnetic radiation.
a. Identify the characteristics of electromagnetic and mechanical waves.
b. Describe how the behavior of light waves is manipulated causing
reflection, refraction diffraction, and absorption.
c. Explain how the human eye sees objects and colors in terms of
wavelengths.
d. Describe how the behavior of waves is affected by medium (such as air,
water, solids).
e. Relate the properties of sound to everyday experiences.
Colors/Visible Light
S8P4. Students will explore the wave nature of sound and
electromagnetic radiation.
a. Identify the characteristics of electromagnetic and mechanical waves.
b. Describe how the behavior of light waves is manipulated causing
reflection, refraction diffraction, and absorption.
c. Explain how the human eye sees objects and colors in terms of
wavelengths.
d. Describe how the behavior of waves is affected by medium (such as air,
water, solids).
e. Relate the properties of sound to everyday experiences.
GPS Standards
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4. Presenters
 John: Explain that the sun is the original energy source for most life
on earth and the basics components needed for photosynthesis. Share
short Discovery Education video on photosynthesis.
 Monique: Explain that the process of photosynthesis converts light
energy to chemical energy. Share the Nova Illuminating Photosynthesis
resource.
 Terence: Identify the reactants and products of photosynthesis, and
explain which reactions in photosynthesis are light dependent which
are light independent. Share the resource Teach Engineering.
 Michelle: Explain why many plants appear green to us here on earth.
Share the resource Biology 4 Kids.
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5. What is the process of photosynthesis?
• Photosynthesis converts light energy into chemical energy.
• Photosynthesis provides the energy needed by most plants,
animals, and other living things.
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6. The Process of Photosynthesis
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7. The Process of Photosynthesis
The process of photosynthesis converts light energy to chemical energy.
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8. Nova Illuminating Photosynthesis
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9. Light Dependent and Independent
Reactions in Photosynthesis
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10. Light Dependent and Independent
Reactions in Photosynthesis
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11. Different wavelengths of visible light are seen
by the human eye as different colors.
WHYWHY AREARE PLAPLANTSNTS GREGREEN?EN?
Gamma
rays
X-rays UV Infrare
d
Micro-
waves
Radio
waves
Visible light
Wavelength (nm)

12. Why are plants green?
Reflected
light
Transmitted light
Sunlight minus absorbedSunlight minus absorbed
wavelengths or colorswavelengths or colors
equals the apparent color ofequals the apparent color of
an object.an object.

13. • The green color
comes from
chlorophyll in the
chloroplasts
• Chloroplasts absorb
light energy and
convert it to
chemical energy
Light
Reflected
light
Absorbed
light
Transmitted
light
Chloroplast
THE COLOR OF LIGHT SEEN IS THE
COLOR NOT ABSORBED

14. • Photosynthesis is the process by which
autotrophic organisms use light energy to make
sugar and oxygen gas from carbon dioxide and
water
AN OVERVIEW OF PHOTOSYNTHESIS
Carbon
dioxide
Water Glucose Oxygen
gas
PHOTOSYNTHESIS

15. Photosynthesis
• Occurs in chloroplasts
• The green color comes from chlorophyll
in the chloroplasts
• Chlorophyll is the green pigment that
captures light for photosynthesis
• The pigments absorb light energy and
create sugar and oxygen

16. Biology 4 Kids
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17. Resources and References
• Google Images of Photosynthesis
• Nova Illuminating Photosynthesis
• Teach Engineering
• Biology 4 Kids
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18. Photosynthesis Quiz
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1. The process of photosynthesis converts
a. Nutrients into cell growth
b. Cell mass into plant structure
c. Light energy into chemical energy
d. Plant cells into animal cells

19. Photosynthesis Quiz
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2. The origin of energy for most life on earth is
a. Carbon, oxygen, and water
b. Natural light from the sun
c. The Earth’s core
d. The atom

20. Photosynthesis Quiz
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3. What are the reactants and products of
photosynthesis?
a. Oxygen and water; carbon
dioxide and sugars
b. Sugars and oxygen; water and
carbon dioxide
c. Carbon dioxide and water; sugar
and oxygen

21. Photosynthesis Quiz
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4. The process of photosynthesis is divided into
two main parts.
What is the order of the process?
a. Light independent reaction and light dependent
reaction
b. Light dependent reaction and light independent
reaction
c. Both of the above
d. None of the above

22. Photosynthesis Quiz
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5. Plants appear green to the human eye due to
a. Reflection of green light
b. The processing of chloroplast
c. Absorption of pure light
d. The processing of chlorophyll