Transcript Warm-UP 11/29/12 Top of page 66 If you were making cake what

Warm-UP
Top of page 62
If you were
making cake
what
ingredients
would you
need?
Make a list!!!
Get out worksheet from
yesterday!!!!
Cake...
• The INGREDIENTS are used to make things.
• What you make is the PRODUCT.
• What you do to make the cake is the
PROCESS.
Write an equation for making
a cake
Example:
INGREDIENTS/INPUTS
OUTPUT
•Flour +Sugar + Eggs + Water = Cake
• Hint: (Notice one side of the equation has all of the ingredients
(inputs/reactants) and the other side has all of the products.)
How do plants
“bake” their own
cake?
Photosynthesis
WHO?
Almost always PLANTS, some
protists use photosynthesis as well!
WHAT?
Photosynthesis
Comes from the Greek word:
Photo - means “light”
synthesis - means “putting together”
The process that a plant uses to capture the
sun’s energy to grow and develop.
It’s the recipe for plant
food!
• Plants use ingredients to make their own food.
• INGREDIENTS/INPUTS
• light energy, water and carbon dioxide.
• PRODUCT/OUTPUTS
• sugar (glucose) and oxygen.
• Glucose is the scientific name for plant food.
Write your own equation for
photosynthesis!
INPUTS/”Ingredients”
OUTPUTS
The equation :
Photosynthesis
Carbon Dioxide + Water + Light Energy
Sugar/Glucose + Oxygen
Sug
ar
This is a chemical
reaction!
INPUTS
Carbon Dioxide + Water + Light Energy
OUTPUTS
Sugar/Glucose + Oxygen
The CO2 and H2O go through a chemical
reaction using the energy from the sun.
Reminder: This is a chemical reaction, a new
substance (sugar) is being made.
The equation :
Photosynthesis
Carbon Dioxide + Water + Light Energy
Sugar/Glucose + Oxygen
Sug
ar
WHERE?
IN THE LEAVES!
Plant leaves contain a green pigment called
chlorophyll
Chlorophyll absorbs light energy from the sun
Happens inside the CHLOROPLASTS
Chloroplasts
WHERE?
Water enters the plant through the
roots. OSMOSIS!!!
Carbon Dioxide enters the
leaf through tiny openings
called the stomata.
DIFFUSION!!!
WHEN?
Deciduous Plants:
SPRING, SUMMER: Food making time!
Plants grow & develop!
WINTER/FALL: Chlorophyll degrades and
the leaves change color & fall off!
Coniferous Plants: All YEAR!
WHY?
Plants are producers, they make ALL their own
food.
Humans are consumers, we eat/consume all
our energy needs.
Brain Check: What organelles are necessary in
plant cells to help them do this?
Chloroplasts!!!
Plants need...
Water (H2O)
Absorbed through roots
Osmosis
Carbon Dioxide (CO2)
Enters leaves through tiny openings called
stomata
Diffusion
Plants Make…
Glucose (C6H12O6)
A type of sugar (food) = stored energy
Some of the sugar gets used by the plants,
some is stored
Oxygen (O2) – a gas
Oxygen exits cells by diffusion!
Leaves through the stomata
http://www.teachersdomain.org/asset/tdc02_vid_
photosynth/
Output
What produces the CO2 plants need? How
does it get in the leaf?
What happens to all the oxygen plants make?
What is the sugar used for?
Draw a picture that shows what goes in and
what comes out during photosynthesis