Photosynthesis Chapter 8 Biology Ms. Meek
Hook If all the plants in the world died would we still be able to live? Silently Write down your thoughts Be ready to share out your thoughts
Objective 3:6 SWBAT describe photosynthesis including its purpose and location within a cell. I can explain where photosynthesis occurs and know how to explain the process. STANDARD 1F: Students know usable energy is captured from sunlight by chloroplasts and is stored through the synthesis of sugar from carbon dioxide.
IBE What do plants need in order to live.
Vocabulary Photosynthesis Chloroplasts Chlorophyll Start making a vocabulary chart for each word in your notebook 1 st Science Definition 2 nd Picture 3 rd Your Definition (HW) 4 th Write a sentence using the word (HW)
Review What are reactants and product?
Notes Use note template to fill in the key terms REMINDER : During notes you are silent while the teacher is talking. If you have a question or comment raise your hand and wait silently to be called on.
Energy & Life Autotrophs: Use light energy from the sun to make their own food. Example: Plants Heterotrophs : Cannot use the sun’s energy directly and must obtain energy from foods they consume. Example: Animals
Think Box When a tiny seed grows into a tall tree where does it get its mass?
Photosynthesis Plants use the energy of sunlight to convert water and carbon dioxide into high energy carbohydrates, and oxygen and a waste product.
Photosynthesis happens in two stages. Stage 1: Chloroplasts capture sunlight and turn it into energy. Stage 2: Plant cells use energy from stage 1 as well as hydrogen (H) and carbon dioxide (CO 2 ) to produce sugars such as glucose.
What happens during photosynthesis can be represented using a chemical equation. A chemical equation shows what molecules or substances are involved and how they combine or divide during a chemical process or reaction. Photosynthesis can be described using the equation above. The substances on the left of the arrow are the raw materials or substances that begin the reaction and the substances on the right of the arrow are the products that are created by the reaction.
Photosynthesis Equation Carbon Dioxide + Water -> Sugars + Oxygen Photosynthesis uses the energy of sunlight to convert water and carbon dioxide into high energy sugar and oxygen
Photosynthesis Takes place in the chloroplasts Requires light and chlorophyll Pigments are light absorbing molecules Plants principal pigment is Chlorophyll Green light is reflected by leafs
Quick Check
Cube activity Rate your understanding Spicy (Feeling Great) Medium(Feeling Good) Blue Group: Mild (Feeling OK) Now I will put you in groups
Cube Activity Work with you group Together answer every question Write down questions and answers in your notebook Quiet voice Remember: banana Only 1 students work per group is checked. I decide who all that is everyone's grade. WORK TOGETHER
Exit Ticket Silently By yourself No Notes When you are done turn it in to the clear bin
Today’s Objective 3:7 SWBAT explain the generalized reaction for photosynthesis.
Lab Review Day Get out lab worksheet Discuss Process Watch Video Graph Results Work on Lab Report
Discussion Questions 1. Which cup exhibited a faster rate of photosynthesis? With CO2 cup or Without 2. What data supports this? 3. So, what effect did CO2 concentration have on the rate of photosynthesis? 4. What errors could have occurred during this lab?
Gallery Walk Visit every station silently Write down your thoughts Put a ? Or *
Line Graphs Watch how to create a line graph Create a line graph with your group Each student makes their own Be ready to present data
Lab Reports Review Examples Write out Hypothesis Materials Procedure: In your own words Results Conclusion TYPE FOR HW: DUE THURSDAY Grade Reports are due this weekend
Chlorophyll & Chloroplast Ms. Meek
Objectives 3:8 SWBAT explain the importance of chlorophyll in photosynthesis. 3.9 SWBAT label a picture of the structure of the chloroplast (stoma, thylakoids, grana)
Importance of Photosynthesis Think, Pair, Share Be ready to share your partners response.
Chlorophyll Chlorophyll is a molecule of chloroplast Chlorophyll absorbs sunlight Gathers suns energy with light absorbing molecules called pigments Does not absorb green, it is reflected
Photosynthesis photo” means light, “synthesis” putting together Chlorophyll captures the light energy needed to drive photosynthesis Carbon Dioxide + Water + Chlorophyll and Sunlight = Oxygen + Sugar
Think Box How do solar panels work?
Chloroplasts Stroma are regions outside the thylakoid membranes in chloroplasts Thylakoids are saclike membranes found in chloroplasts Grana are stacks of thylakoids
Chloroplast Diagram
Complete Worksheet Quietly work on worksheet If you have a question raise your hand Underline point that discuss Chlorophyll Be prepared to share answers with class
Quiz Silently Answer all questions Follow instructions
In what ways can we use sunlight?
Objectives 3:10 SWBAT state what happens in the light dependent (light collection) and light independent (using energy for converting CO 2 into sugars) reactions in generalized terms. I can explain what happens during light dependent and light independent reactions.
Light Dependent Reactions Require LIGHT Plants require light to grow Reaction use energy from light to produce ATP NADPH
Light Dependent Reaction Produces oxygen gas and converts ADP and NADP+ into energy carriers ATP and NADPH This reaction is the source of nearly all of the oxygen in Earth’s atmosphere
Light Independent Reaction Does not require light Called the Calvin Cycle Uses ATP and NADPH to produce high- energy sugars
Think Box How do you think the amount of light affects plant growth?
Light Independent Reaction (Calvin Cycle) Produces High-Energy Sugars These are high energy compounds that can be stored for a long time Removes carbon dioxide from the atmosphere and produces energy rich sugars.
Light Independent Reaction (Calvin Cycle) Plant uses sugars to build more complex macromolecules such as cellulose that it needs for growth and development. Organisms eat the plants and can use that energy stored in carbohydrates.
Post it Questions Create a question for our game! Write it on the post it Can be True or false Multiple choice: Create answer choices Single response
Game Time Groups 3-4 One white board per group 2 minutes to answer question with group Use a quiet voice WINNING GROUP gets 5 extra notebook points
Create a Foldable Photosynthesis Light Dependent Reaction Light Independent Reaction Work independently Use Quiet Voice Draw Pictures and my definitions in your own words. Be ready to share yours If you finish early read Page and add more key facts
EXIT TICKET Complete Silently By yourself No Notes Explain your Claims