Warm up 10/31

How do animals store Energy? Plants?

What gas do animals breath in and what gas do animals breath out during the day? What about at night?

What gas do animals breath in and what gas do animals breath out during the day? What about at night?

1

Overview of Photosynthesis

2

What is Photosynthesis?

1. Plants use photosynthesis to make sugars

2. Photosynthesis is a process that captures energy from sunlight to make sugars that store chemical energy

3

What is Photosynthesis?

3. Equation for whole photosynthetic process

 6CO2 + 6H2O C6H12O6 (sugar)+ 6O2

Identify the reactants and the products.   

    4

Where does Photosynthesis occur?

1. Photosynthesis in plants occurs in chloroplasts

a. Takes place in two parts: stroma and thylokoid

2. Most chloroplasts are in leaf cellschloroplast

stroma

grana (thylakoids)

5

Functions of Photosynthesis

1. Plant produce food for themselves and other organisms.

Where does ALL the energy originate from? 6

All energy comes from the SUN!

Functions of Photosynthesis

7

2. Regulates Earth’s environment (removes carbon dioxide from Earth’s atmosphere)

Functions of Photosynthesis

8

Factors that Affect Photosynthesis

Temperature• As temperature increases, the rate of

photosynthesis increases to a maximum and then decreases when temps get too hot.

– The rate peaks at a certain temperature, at which many of the enzymes that catalyze the reactions become ineffective. Also, the stomata begin to close, limiting water loss and entry of carbon dioxide.

9

Which graph represents the affect of temperature on the rate of photosynthesis?

10

Draw this graph in your notes

11

Factors that Affect Photosynthesis

Light Intensity

• Rate of photosynthesis increases as light intensity increases

• However, at some point all available e- are excited, and the maximum rate of photosynthesis is reached

12

Which of the graphs represents the effect of light intensity on the rate of photosynthesis?

13

Draw the circled image in your notes

14

Assignment

T4 pg. 113-115 Place Summaries of each page on the

blank page on the back.Will collect Notebooks Friday.

If needed there is a checklist online.

15