Photosynthesis
An Introduction & Overview
As always…
• Key concepts are underlined
• Vocab is in green
Objective
1. Write the overall equation for photosynthesis in both symbols and words
2. Identify the reactants and products for the 2 stages of photosynthesis
On your whiteboards
• What are some things plants NEED in order to survive?
Draw this
Photosynthesis
• Plants need 3 things to do photosynthesis:
1. Water1. Taken in through roots or
surroundings
2. Carbon dioxide (CO2)1. Taken in from air or water
3. Light energy from the sun
Photosynthesis
• Photosynthesis is a process plants use to convert the light energy from the sun into chemical energy that they can use
• The chemical energy is a molecule of sugar called glucose
• Plants and animals use this for food
Photosynthesis
• We can show the overall process of photosynthesis in a chemical equation
• Water = H2O• Carbon dioxide = CO2
• Light energy• Glucose = C6H12O6
• Oxygen = O2
On your whiteboards
•What is the chemical symbol for carbon dioxide?
•What is the chemical symbol for glucose?
•What is the chemical symbol for oxygen?
Equation
REACTANTS – what goes into a chemical process
They react during photosynthesis to make something new
Water + Carbon dioxide + Light energy
Write this part of the equation on your whiteboard in SYMBOLS
Photosynthesis equation
• PRODUCTS: what comes out of a chemical process
• Glucose - C6H12O6
• Oxygen – O2
Water + Carbon dioxide + Light energy Glucose + Oxygen
Write the entire equation for photosynthesis on your whiteboards using SYMBOLS
Quick Check with Popsicle Sticks
• What is the chemical symbol for water?• What is the chemical symbol for oxygen?• What is the chemical symbol for carbon
dioxide?• What is the chemical symbol for glucose?• What are the reactants of photosynthesis?• What are the products of photosynthesis?
Balance the equation
H2O + CO2 Light energy C6H12O6 + O266 6
On your whiteboards
• What type of energy goes into a plant during photosynthesis?
• How do plants store this energy?
2 stages of photosynthesis
• Stage 1 – the Light Reactions Reactants: Light and
water Products: oxygen
(O2), energy molecules ATP and NADPH
Location: thylakoid membranes inside the chloroplast
2 Stages of Photosynthesis
• Stage 2 – the Calvin Cycle (or light-independent reactions) Reactants: carbon
dioxide (CO2) Products: glucose,
ADP, NADP+
Location: stroma inside the chloroplast
Video Segment 1 – Plant Cells
Words to write and listen for: 1. LEAVES2. WATER3. ROOTS
4. PHOTOSYNTHESIS
Now…LISTEN to the video segment
Now…WRITE a 1 sentence summary using those words
Video Segment 2 – A Sweet Discovery
Words to write and listen for:
SunChloroplasts
FoodSugar
Now…LISTEN to the video segment
Now…WRITE a 1 sentence summary using those words
Video Segment 3 – Jay’s Journal
Words to write and listen for:Chlorophyll
Green Yellow Red
Now…LISTEN to the video segment
Now…WRITE a 1-2 sentence summary using those words
Video Segment 4 - Photosynthesis
Words to write and listen for: Thylakoids Chlorophyll
Light Calvin cycle Glucose
Now…LISTEN to the video segment
Now…WRITE a 1-2 sentence summary using those words
Objective
1. Write the overall equation for photosynthesis in both symbols and words
2. Identify the reactants and products for the 2 stages of photosynthesis
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