Cellular Energy
Catalyst: What does ATP stand for? Describe what cells need ATP for.
What type of energy is ATP? Describe where the energy in ATP
is stored. Explain how the energy in ATP can
be released.
Write in complete sentences!Don’t talk during the Catalyst!
Agenda
Be all that you can be. Is it worth it? Let me work it – Using ATP!
REVIEW! Photosynthesis BRAIN GAIN EQ
Announcements
Homework: Complete worksheet from today
Unit Test: THURSDAY
Progress Report grades are in the computer.
ObjectivesWRITE THESE AT THE TOP OF YOUR NOTES
By the end of today, SWBAT…Write the balanced equation for photosynthesis
Explain the role of water, carbon dioxide, sugar, and sunlight in photosynthesis
Cellular Energy
Key Point #1: Cells need energy in the form of ATP to do work If energy is not in the form of ATP,
then it must be changed into ATP before a cell can use it
ATP is the form of energy that lets cells do what they want Cells need ATP to grow, Muscle cells need ATP to
contract, Brain cells need ATP to think, etc.
How ATP Works
ATP = adenosine triphosphate The energy of ATP is stored in the bonds of the phosphate moleculesChemical energy = energy stored in chemical bonds
Break off the last phosphate, and energy is releasedBecomes ADP
PHOTOSYNTHPHOTOSYNTHESIS!ESIS!
Chemical Reactions
Key Point #1: Chemical reactions REARRANGE reactants into products. Reactants = Materials you START with
in a chemical reaction. Products = Materials you FINISH with
in a chemical reaction.
Photosynthesis is a specific chemical reaction that, using energy from the sun, rearranges its reactants into its products.
PHOTOSYNTHESIS
is a CHEMICAL
REACTION
Photosynthesis
Key Point #2: Photosynthesis converts solar energy from the Sun into chemical energy in glucose. Glucose = a type of sugar Happens in the chloroplasts Plant cells only
The Equation
What do plants need to grow? Water, carbon dioxide, sunlight
What is made by photosynthesis? Glucose
The Equation
Key Point #3: The reactants of photosynthesis are carbon dioxide, water, and sunlight. The products are glucose and oxygen. Carbon dioxide = CO2
Water = H2O Glucose = C6H12O6
Oxygen = O2
Unbalanced
CO2 + H2O + sun C6H12O6 + O2
BALANCED!BALANCED!
6CO2 + 6H2O + sun C6H12O6 + 6O2
REACTANTS PRODUCTS
Practice
Groups.White boards.60 seconds.
Practice
Why do cells need energy?
Practice
Cells use energy in the form of
______.
Practice
What type of energy does ATP
have?
Practice
Where is the energy in ATP
stored?
Practice
How is the energy in ATP released?
Practice
What happens in photosynthesis?
(Sum it up.)
Practice
Where does photosynthesis
occur?
Practice
What type of cells do
photosynthesis?
Practice
Where does photosynthesis
occur?
Practice
Why can’t cells stop after
photosynthesis, and just use
sugar for energy?
Independent Practice
Work hard,get smart.
Photosynthesis Key Point Wrap-Up Key Point #1: Chemical reactions
REARRANGE reactants into products.
Key Point #2: Photosynthesis converts solar energy from the sun into chemical energy in glucose.
Key Point #3: The reactants of photosynthesis are carbon dioxide, water, and sunlight. The products are glucose and oxygen.
Exit Questions
Below is the unbalanced equation for photosynthesis. Balance it. CO2 + H2O + sunlight C6H12O6 + O2
What are the reactants in photosynthesis?
What are the products in photosynthesis?Write in complete sentences!
Don’t talk during the Exit Question!
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