Saving for a Rainy Day

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Saving for a Rainy Day
Interest Grabber
Section 8-1

• Suppose you earned extra money by having a
  part-time job. At first, you might be tempted to
  spend all of the money, but then you decide to
  open a bank account.
• 1. What are the benefits of having a bank
  account?
• 2. What do you have to do if you need some of
  this money?
• 3. What might your body do when it has more
  energy than it needs to carry out its
  activities?
• 4. What does your body do when it needs energy?

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Section Outline
Section 8-1

• 81 Energy and Life
• A. Autotrophs and Heterotrophs
• B. Chemical Energy and ATP
• 1. Storing Energy
• 2. Releasing Energy
• C. Using Biochemical Energy

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ATP
Section 8-1
Adenine
Ribose
3 Phosphate groups
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Figure 8-3 Comparison of ADP and ATP to a Battery
Section 8-1
ADP
ATP
Energy
Energy
Adenosine diphosphate (ADP) Phosphate
Adenosine triphosphate (ATP)
Partially charged battery
Fully charged battery
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Figure 8-3 Comparison of ADP and ATP to a Battery
Section 8-1
ADP
ATP
Energy
Energy
Adenosine diphosphate (ADP) Phosphate
Adenosine triphosphate (ATP)
Partially charged battery
Fully charged battery
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Trapping Energy
Interest Grabber
Section 8-2

• Have you ever used a solar-powered calculator? No
  matter where you go, as long as you have a light
  source, the calculator works. You never have to
  put batteries in it.

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Interest Grabber continued
Section 8-2

• 1. A solar-powered calculator uses solar cells
  that are found in rows along the top of the
  calculator. Into what kind of energy is the light
  energy converted so that the calculator works?
• 2. Recall that plants use light energy from the
  sun to make food. Into what kind of energy is the
  light energy converted by plants?
• 3. Most plants, no matter what size or shape they
  are, have some parts that are green. Which parts
  of a plant are usually green?
• 4. What does the green color have to do with the
  plants ability to convert light energy into the
  energy found in the food it makes?

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Section Outline
Section 8-2

• 82 Photosynthesis An Overview
• A. Investigating Photosynthesis
• 1. Van Helmonts Experiment
• 2. Priestleys Experiment
• 3. Jan Ingenhousz
• B. The Photosynthesis Equation
• C. Light and Pigments

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Photosynthesis Reactants and Products
Section 8-2
Light Energy
Chloroplast
CO2 H2O
Sugars O2
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Figure 8-5 Chlorophyll Light Absorption
Section 8-2
Absorption of Light by Chlorophyll a and
Chlorophyll b
Chlorophyll b
Chlorophyll a
V
B
G
Y
O
R
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A Look Into the Future
Interest Grabber
Section 8-3

• It is 100 years in the future and you are a
  research scientist. An enormous volcanic eruption
  has recently sent huge quantities of dust and ash
  into the atmosphere.
• Working with a partner, make a list of how this
  event will affect each of the following
• 1. photosynthesis
• 2. plant life
• 3. animal life
• 4. human societies

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Section Outline
Section 8-3

• 83 The Reactions of Photosynthesis
• A. Inside a Chloroplast
• B. Electron Carriers
• C. Light-Dependent Reactions
• D. The Calvin Cycle
• E. Factors Affecting Photosynthesis

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Concept Map
Section 8-3
Photosynthesis
includes
takes place in
uses
use
take place in
to produce
to produce
of
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Figure 8-7 Photosynthesis An Overview
Section 8-3
Chloroplast
Chloroplast
NADP
ADP P
Light- Dependent Reactions
Calvin Cycle
ATP
NADPH
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Figure 8-10 Light-Dependent Reactions
Section 8-3
Hydrogen Ion Movement
Chloroplast
Photosystem II
ATP synthase
Inner Thylakoid Space
Thylakoid Membrane
Stroma
Electron Transport Chain
Photosystem I
ATP Formation
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Figure 8-11 Calvin Cycle
Section 8-3
CO2 Enters the Cycle
Energy Input
ChloropIast
5-Carbon Molecules Regenerated
6-Carbon Sugar Produced
Sugars and other compounds
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Video Contents
Videos

• Click a hyperlink to choose a video.
• ATP Formation
• Photosynthesis
• Light-Dependent Reactions, Part 1
• Light-Dependent Reactions, Part 2
• Calvin Cycle

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Video 1
Video 1
ATP Formation

• Click the image to play the video segment.

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Video 2
Video 2
Photosynthesis

• Click the image to play the video segment.

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Video 3
Video 3
Light-Dependent Reactions, Part 1

• Click the image to play the video segment.

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Video 4
Video 4
Light-Dependent Reactions, Part 2

• Click the image to play the video segment.

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Video 5
Video 5
Calvin Cycle

• Click the image to play the video segment.

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Internet
Go Online

• ATP activity
• Interactive test
• For links on Calvin cycle, go to www.SciLinks.org
  and enter the Web Code as follows cbn-3082.
• For links on photosynthesis, go to
  www.SciLinks.org and enter the Web Code as
  follows cbn-3083.

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Section 1 Answers
Interest Grabber Answers

• 1. What are the benefits of having a bank
  account?
• To save money and earn interest.
• 2. What do you have to do if you need some of
  this money?
• Go to the bank and take out the money you need.
• 3. What might your body do when it has more
  energy than it needs to carry out its
  activities?
• Students will likely say that the body stores
  the energy.
• 4. What does your body do when it needs energy?
• Student answers may include that energy is
  gotten from food.

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Section 2 Answers
Interest Grabber Answers

• 1. A solar-powered calculator uses solar cells
  that are found in rows along the top of the
  calculator. Into what kind of energy is the light
  energy converted so that the calculator works?
• They convert light energy into electrical
  energy.
• 2. Recall that plants use light energy from the
  sun to make food. Into what kind of energy is the
  light energy converted by plants?
• Plants convert light energy into chemical
  energy.
• 3. Most plants, no matter what size or shape they
  are, have some parts that are green. Which parts
  of a plant are usually green?
• Leaves are green, as are some stems.
• 4. What does the green color have to do with the
  plants ability to convert light energy into the
  energy found in the food it makes?
• The green color is the pigment chlorophyll,
  which absorbs light energy from the sun and
  converts it to chemical energy in the process of
  photosynthesis.

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Section 3 Answers
Interest Grabber Answers

• Working with a partner, make a list of how this
  event will affect each of the following
• 1. photosynthesis The rate of photosynthesis
  will decrease due to reduced sunlight.
• 2. plant life Plants will grow more slowly or
  die off due to decreased rate of
  photosynthesis.
• 3. animal life Animal populations will decrease
  after a while due to fewer plants for
  herbivores to eat. Fewer herbivores will
  eventually result in fewer carnivores. Also, less
  oxygen will be available.
• 4. human societies Human societies will have to
  adjust their eating habits as some food
  species die out.

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End of Custom Shows

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