Photosynthesis
What is photosynthesis?

Photosynthesis = is the process
that allows plants to make their
own food from sunlight.
All living thing need food

Autotroph = an organism that makes its own
food

Heterotroph = organisms that cannot make
their own food
Types of Animals
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Herbivore = Animal that only eats plants

Carnivore = Animal that only eats meat

Omnivore = Animal that eats meats and
plants
What Kind of Animal is this?
What Kind of Animal is this?
What Kind of Animal is this?
What Kind of Animal is this?
What Kind of Animal is this?
What Kind of Animal is this?
What Kind of Animal is this?
But………
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Do all animals rely on plants for food?

Actually they do. Lets look at a simple food
chain.

Grass – Zebra – Lion

The Lion would not be alive to eat the Zebra
if it wasn’t for the Zebra eating the grass.
What is needed for
photosynthesis to occur?

Light is needed for photosynthesis to
occur.
Where does photosynthesis occur?



Stage 1
Photosynthesis occurs in the leaves of a
plant.
Sunlight is captured by the chloroplast in
the leaves.
Where does photosynthesis occur?


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Stage 2
Water enters the plants through the roots
Carbon Dioxide enters the plants through
Stomata
Stomata = small openings on the leaves
The sunlight, water, and carbon dioxide mix
and create Glucose
Photosynthesis Equation
Besides food how does
photosynthesis help us?

During the process of photosynthesis,
oxygen is produced. We use this
oxygen to breathe.
Now What

Respiration is the process by which cells
obtain energy from glucose.

All living things need continuous energy so all
cells carry out respiration continuously.
2 stages of respiration

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Stage 1 takes place in the Cytoplasm.
glucose is broken down without any oxygen
and a small amount of energy is created.
Stage 2 Takes place in the mitochondria
Oxygen mixes with these molecules to create
more energy.
Respiration Equation
What do you notice
Photosynthesis
Respiration
That’s Right

Photosynthesis and Respiration are the
opposite

Photosynthesis helps create oxygen for us

Respiration creates carbon dioxide for plants

It is a never ending cycle