Photosynthesis

1
Bell Work

• Diffusion Lab Questions
• The plastic bag is semipermeable to which
  substance?
• Why did the iodine enter the bag?
• Why didnt the starch enter the beaker?
• How is the plastic bag like the cell membrane?
• What is the definition of the word diffusion?
• Cell Energy
• Make a list of the reasons why a cell might need
  energy.

2
Photosynthesis Cellular Respiration

• Chapter 3, section 2
• Chapter 7, section 1
• Continuing with the movement of particles into
  and out of cells

3
What is photosynthesis?

• ____________ is the process by which plants make
  their own food.
• The word photosynthesis means combine with
  _______ or _______ by light.

Photosynthesis
made
light
4
Where does photosynthesis occur?

• Photosynthesis occurs in the ________ of a plant.
  More specifically- in the ___________.

leaves
chloroplasts
5
Plant Cell

Chloroplast are organelles in a plant cell.
6
Inside of the chloroplast

• _____________ is found in the chloroplasts.
• Chlorophyll is the ___________ that makes the
  plant _________.
• Chlorophyll __________ light energy.

Chlorophyll
pigment
green
absorbs
7
Photosynthesis needs and products

• Plants use the ______ energy captured by
  chlorophyll to change ______ ______ and _______
  to food.
• The food is in the form of a sugar called
  __________ (C6H12O6).
• Photosynthesis also produces ________.

light
carbon
dioxide
water
glucose
oxygen
8
How does photosynthesis help us?

• During the process of photosynthesis, oxygen is
  produced. We use this oxygen to breathe. We
  also receive energy from the plant when we eat
  plants.

9
Reactants vs. Products

• Reactants are what you need to make something-
  The reactants for photosynthesis are Sunlight,
  Carbon Dioxide and Water.
• Products are what you make- The products for
  photosynthesis are Glucose (sugar) and Oxygen.

10
EQUATION FOR PHOTOSYNTHESIS
11
Photosynthesis Video
12
Photosynthesis and Cellular Respiration

• Cellular respiration is a chemical reaction that
  occurs in cells.
• During cellular respiration, cells use oxygen to
  produce energy from food.
• Food (glucose) is broken down into CO and H O,
  and energy is released.
• The released energy is used to maintain body
  temperature in animals. It is also used to form
  ATP, which supplies energy that fuels cell
  activities.

²
²
13
EQUATION FOR RESPIRATION
14
The Connection Between Photosynthesis and
Respiration
15
Reactants vs. Products

• Reactants are what you need to make something-
  The reactants for cellular respiration are
  Glucose (sugar) and Oxygen.
• Products are what you make- The products for
  cellular respiration are Carbon Dioxide, Water
  and ATP.

16
Alternative to Cellular Respiration

• Fermentation produces ATP without using oxygen.
  It can occur in muscles when they are unable to
  get oxygen for respiration.
• Fermentation also produces lactic acid. This
  acid can cause muscle fatigue.

17
Scientist Notebook Drawings

• Draw the Carbon Dioxide/Oxygen Cycle pg. 84
• Draw a plant to represent the plant cell
• Draw an animal to represent the animal cell
• Draw arrows with chemical formulas
• Draw the sun with arrow
• Draw ATP with arrow
• Include Photosynthesis and Respiration
  explanations
• Draw, color, and label figure 2 on pg. 185.