Aim: How do Autotroph's make their food? Do Now: Create a chemical equation that illustrates what's happening here. Homework: Textbook pages Q’s 1,3,4 &6 complete sentences Do Now: Create a chemical equation that illustrates what's happening here. Homework: Textbook pages Q’s 1,3,4 &6 complete sentences

Photosynthesis

What Happens during Photosynthesis?

1.Chlorophyll traps light causing Water to split into H and O H 2 O  H 2 + O

2. Oxygen (waste) exits through stomata Hydrogen = used for next part H 2 O  H 2 + O Oxygen (air)

3.CO 2 and H combine to form glucose CO 2 + H Glucose (C 6 H 12 O 6 )

Chemical reaction Sunlight + Carbon dioxide + Water  Glucose + Oxygen (Raw materials/reactants)  (products) SUNLIGHT + H CO 2  C 6 H 12 O 6 + O 2 Sunlight = provides the energy needed to begin the process of photosynthesis Reactants/ Raw materials = the chemicals needed to start process Products = the substances made from the process. Sunlight + Carbon dioxide + Water  Glucose + Oxygen (Raw materials/reactants)  (products) SUNLIGHT + H CO 2  C 6 H 12 O 6 + O 2 Sunlight = provides the energy needed to begin the process of photosynthesis Reactants/ Raw materials = the chemicals needed to start process Products = the substances made from the process.

Carbon + dioxide wateroxygenglucose + light enzymes light 6CO 2 + 6H 2 O C 6 H 12 O 6 + 6O 2 enzymes (waste) The formula of photosynthesis

Define Photosynthesis. What is the energy source that starts the process? THE SUN

What raw materials are used by the process of photosynthesis? and Carbon Dioxide Water

What are the products of the photosynthesis ? Glucose (Sugar) O2O2

Where does Photosynthesis occur?

The Leaf is the plant’s photosynthetic organ. The leaf’s chlorophyll absorbs solar energy. This is where photosynthesis occurs.

CHLOROPLASTCHLOROPLAST SITE OF PHOTOSYNTHESIS

The inside of the leaf: The leaf is made up of many cells which contain organelles called chloroplasts. * See Leaf structure handout

Why Is the Sunlight important?

Sunlight or White light Sunlight or white light is actually a combination of all the colors of the rainbow: Blue, indigo, violet, green, yellow, orange, and red. Plants appear green because they absorb all the colors except green, which is reflected. It is the energy from light that energizes electrons which start the process of photosynthesis.

Photosynthetic pigments: Which colors are most effective for photosynthesis?

Best color light for photosynthesis Blue & red Easily absorbed

Different wavelengths of visible light are seen by the human eye as different colors. WHY ARE PLANTS GREEN? Gamma rays X-rays UV Infrared Micro- waves Radio waves Visible light Wavelength (nm)

Sunlight minus absorbed wavelengths or colors equals the apparent color of an object. The feathers of male cardinals are loaded with carotenoid pigments. These pigments absorb some wavelengths of light and reflect others. Reflected light

Why are plants green? Reflected light Transmitted light

Chloroplasts contain PIGMENTS (chlorophyll) that absorb the sun’s energy and use it to create glucose Light THE COLOR YOU SEE IS THE COLOR REFLECTED

Least effective = GREEN (reflected)

Define Photosynthesis It is the process that plants use to create food (organic materials) using the suns energy.

Review:Review: What is the equation for photosynthesis? SUNLIGHT + H CO 2  C 6 H 12 O 6 + O 2

What are the best color lights for photosynthesis to occur? Blue & red Because they are easily absorbed Review:Review:

Photosynthesis Song

Aim: How are plants adapted for autotrophic nutrition? Do Now: 1.) 2.) Identify A and B B A

ROOTS STOMATA LEAVES VASCULAR TISSUE/BUNDLE

the root is the organ of a plant body that typically lies below the surface of the soil The two major functions of roots are ROOTS 1.) absorption of water and inorganic nutrients 2.) anchoring the plant body to the ground

STOMATA (stomate; singular) is a pore found in the leaf and stem epidermis that is used for gas exchange Guard cells Guard cells are responsible for regulating the size of this opening

Guard cells and Homeostasis Guard cells control the opening and closing of the stomata. This allows the leaf to control water loss (transpiration). They allow carbon dioxide to enter and oxygen to be released. Guard Cell Stomata

is the evaporation of water from plants that occurs at the leaves while their stomata are open (for the passage of CO2 and O2 during photosynthesis)stomata Transpiration

Why are most plants green? The leaf and chloroplasts The organelle chloroplast contains the pigment chlorophyll which absorbs every color except green which is reflected. How does chloroplast assist in autotrophic nutrition?

The planet is 70% water so most photosynthesis occurs in the oceans. On land or under water, the process of photosynthesis is still the same: energy + carbon dioxide produces sugar and oxygen. The producers are algae and phytoplankton. On land or under water, the process of photosynthesis is still the same: energy + carbon dioxide produces sugar and oxygen. The producers are algae and phytoplankton.

Phytoplankton: producers in the oceans Located just beneath the water’s surface These producers form the foundation for marine food webs

What role does chloroplast and chlorophyll play in the process? Chloroplast is the organelle inside the plant cell that photosynthesis takes place. Chlorophyll is the pigment that attracts light to start the process.

What is the least effective light for photosynthesis? GREEN because most plants reflect the color!

What is the photosynthetic organ of the plant? The LEAF

How does carbon dioxide enter the plant? Carbon dioxide enters the leaf through openings called stomata Stoma

Photosynthesis review: What part of the leaf regulates transpiration and gas exchange? Guard Cells Review

ReviewReview Guard cells control opening of stomata. Carbon dioxide enters the leaf through openings called stomata. Water is absorbed from the soil and is carried to the leaf. Stomata=pores

Photosynthesis review: See video and take quiz ;-) Photosynthesis “The Summary”