Egg-Mosis

• Why did the egg swell while it was in the vinegar?• What process occurred when the egg

shrank while in the syrup?• How can you explain the largest

circumference in the egg after being in distilled water?

Gizmo Photosynthesis

• Why did using green light not increase photosynthesis?• What is a limiting factor?• How does oxygen production relate

to the rate of photosynthesis?

2006-2007

Photosynthesis:Life from Light and Air

Plants are energy producers• Like animals, plants need energy to live• Unlike animals, plants don’t need to eat

food to make that energy• Plants make food by storing energy– animals are consumers– plants are producers

How do plants make food?• Plants use the energy from the sun– to make ATP energy– to make sugars• glucose, sucrose, cellulose, starch, & more

sun

ATP

sugars

Using light & air to grow plants

6CO2 6H2O C6H12O6 6O2sunenergy

+ ++

glucose + oxygencarbondioxide

sunenergy+ water +

(ATP)

• Photosynthesis– using sun energy to make ATP– using carbon dioxide & water to make sugar– in chloroplast– allows plants to grows– makes a waste product

• oxygen

What do plants need to grow?• The “factory” for making

energy & sugars– chloroplast

• Fuels– sunlight– carbon dioxide– water

• The Helpers– enzymes H2O

sugars

ATP

Make ATP!Make sugar!I can do it all…And no oneeven notices!

enzymes

CO2

sun

Chloroplasts are only in plantsanimal cellsanimal cells plant cellsplant cells

CO2

Chloroplasts

Chloroplastsin cell

LeafLeaf

Chloroplast

absorbsunlight & CO2

makeenergy & sugar

ChloroplastscontainChlorophyll

• Bring In– CO2

– H2O– light

• Let Out– O2

• Move Around– sugars

So what does a plant need?

6CO2 6H2O C6H12O6 6O2lightenergy + ++

roots

shoot

leaves

• All energy in a glucose molecule is located in THE BONDS.

• When the bonds of this molecule are broken, energy is released. This happens in the MITOCHONDRIA of the cell (the powerhouse organelle).

Mitochondria are in bothanimal cellsanimal cells plant cellsplant cells

How are they connected?

glucose + oxygen carbon + water + energydioxide

C6H12O6 6O2 6CO2 6H2O ATP+ + +

Respiration—Mitochondria

Photosynthesis—Chloroplast

6CO2 6H2O C6H12O6 6O2lightenergy + ++

glucose + oxygencarbondioxide

sunenergy+ water +

H2O

Energy cycle(Carbon or Oxygen cycle)

Photosynthesis

Cellular Respiration

sun

The Great Circleof Life!Where’s Mufasa?

glucose O2CO2

plants

animals, plants

ATP

Energy needs of life• All life needs a constant input of energy– Animals = Heterotrophs• get their energy from “eating others”

– eat food = other organisms = organic molecules

• make energy through respiration– Plants = Autotrophs • get their energy from “self”

– get their energy from sunlight– build organic molecules (food) from CO2

• make energy through photosynthesis

The poetic perspective• All of the solid material of every plant

was built out of thin air• All of the solid material of every animal was

built from plant material

Then all the cats, dogs, mice, people & elephants…are really strands of air woven together by sunlight!

sunair

2006-2007

Got the energy…

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