Photosynthesis

Chapter 8Biology 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 notebook1st Science Definition 2nd Picture 3rd Your Definition (HW)4th 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 BoxWhen 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 (CO2) 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 Questions1. 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 ReportsReview 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 CO2 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 independentlyUse Quiet VoiceDraw Pictures and my definitions in your own words. Be ready to share yours

If you finish early read Page 210-213 and add more key facts

EXIT TICKET Complete Silently By yourself No Notes Explain your Claims