Photosynthesis Photosynthesis

Photosynthesis Photosynthesis Photosynthesis Photosynthesis - Start

2018-11-08 7K 7 0 0

Photosynthesis Photosynthesis - Description

Photosynthesis. - a process used by plants and other autotrophs to convert the light energy captured from the sun into chemical energy that can be used to fuel the organism’s activities. . *It is the way plants make food! . ID: 723010 Download Presentation

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Photosynthesis Photosynthesis




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Presentations text content in Photosynthesis Photosynthesis

Slide1

Photosynthesis

Slide2

Photosynthesis

Photosynthesis

- a process used by plants and other autotrophs to convert the light energy captured from the sun into chemical energy that can be used to fuel the organism’s activities. *It is the way plants make food! *The most important chemical reaction on our planet!

Slide3

Photosynthesis

Photosynthesis occurs in the

chloroplastThe chloroplast is filled with a light absorbing pigment called chlorophyll

Slide4

Chloroplast

Chloroplasts are found in high concentration in the leaves of plants

Green color due to the pigment chlorophyllTwo membranes cover the outsideThylakoid

are stacked inside and chlorophyll is embedded there

Thylakoids are surrounded by jelly-like substance call

stroma

Slide5

Chlorophyll

The chlorophyll in the leaf absorbs the light emitted by the sun.

The most absorbed colors are red and blueThe most reflected color is greenThis is why when you look at a plant you see green

Slide6

Leaf Structure

Many plant cells make up a single leaf from a plant

The top of the leaf is covered with a waxy cuticle (lipid) to prevent the loss of water

Slide7

Leaf Structure

The bottom/underside of the leaves are porous and have openings called

stomata (controlled by guard cells) that allow for the gas exchange (CO2 in, O2 out)

Some cells are packed tightly, while some are “spongy” and allow air to get to all of the cells

Slide8

Leaf Structure

Palisade layer

- most photosynthesis occurs here!Closely packed cells prevents wasted sunlightLocated at top of leaf where sun hits

Lots of chloroplasts

Large/long cells to increase surface area and light absorption

Slide9

Leaf Structure

Vascular tissue -

Xylem and Phloem Xylem = carries water up the plant

Phloem = carries nutrients/food down plant

Slide10

Draw and Label

Slide11

Photosynthesis Reaction

Slide12

Photosynthesis Reaction

Plant captures light energy and uses that energy to make glucose

Sunlight provides the energy needed to change molecules of carbon dioxide and water into glucose Oxygen is released in this reaction as waste product

Slide13

Photosynthesis Reaction

(reactants) → (products)

Reactants = Water, carbon dioxide, sunlightProducts = Glucose, oxygen

Slide14

Photosynthesis

Video

Slide15

Reactants and Products

CO

2 - Enters through stomata from the air H2O - Xylem carries up from the soil Sunlight - Trapped by chlorophyll in chloroplasts

O2 - Exits through stomata

Slide16

Practice

Draw a picture of a leaf

Label where reactants enter a plant Label where products exit a plant

Slide17

Factors Affecting Photosynthesis

Light intensity and temperature

As light intensity increases, photosynthesis rate increasesAs temperature increases, photosynthesis rate increases

If temperature increases TOO much, the enzymes denature and photosynthesis rate decreases

Carbon dioxide level

As CO

2

levels increase, the rate of photosynthesis increases

Water

As water levels decrease, the rate of photosynthesis decreases


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