Environmental Literacy Project. Michigan State University. . Plants . Unit. Activity 4.3 Molecular Models for Potato Photosynthesis. 1. Next Unit. Inquiry . (up the triangle). Model. Coach. Fade. Post test. ID: 747204
DownloadNote - The PPT/PDF document "Carbon: Transformations in Matter and En..." is the property of its rightful owner. Permission is granted to download and print the materials on this web site for personal, non-commercial use only, and to display it on your personal computer provided you do not modify the materials and that you retain all copyright notices contained in the materials. By downloading content from our website, you accept the terms of this agreement.
Carbon: Transformations in Matter and Energy
Environmental Literacy Project
Michigan State University
Plants
UnitActivity 4.3 Molecular Models for Potato Photosynthesis
1
Slide2Next Unit
Inquiry (up the triangle)ModelCoachFadePost test
Maintain
Observations
Patterns
Models
Data from mass of plants growing from seed.
Data from plants in the light and dark with BTB.
Plants gain mass (more).
Soil loses mass (less).
Plants take in CO
2
in the light.
Plants release CO
2
in the dark.
Photosynthesis
Biosynthesis
Cellular Respiration
Plants
Unit Map
Pre Lesson
Pretest
Establish the Problem
Lesson 1: Pretest and Initial Ideas
Lesson 2: Foundations: Zooming into Organisms
Application
(down the triangle)
Lesson 1: Pretest and Expressing Ideas
Pre Lesson: Investigation Set-Up
Lessons 4 & 5: Explaining How Plants Make Food, Move, Function, and Grow
Lesson 6: Explaining Other Examples of Plant Growth and Functioning
Observe
Evidence-
Based
Arguments
Found-
ational
Knowl
-edge and Practice
Lesson 3: Investigating Plants
Predict & Express Ideas
You are here
Slide3Connecting Questions about Processes at Different Scales3
ScaleUnanswered QuestionsMacroscopic ScaleHow does a potato plant make the food it needs to grow and function? Microscopic ScaleHow do potato’s leaf cells produce the food the potato needs to grow and function?Atomic-Molecular ScaleWhat chemical change produces food in the potato’s leaf cells?
Slide4How does a potato plant make the food it needs to grow and function?
4
Food
To Cells
Materials
for growth:
Biosynthesis
Energy:
Cellular
respiration
Slide5Chemical change
Connecting the Atomic-Molecular Scale to the Macroscopic Scale
5
Slide6How atoms bond together in moleculesAtoms in stable molecules always have a certain number of bonds to other atoms:
Carbon: 4 bondsOxygen: 2 bondsHydrogen: 1 bondOxygen atoms do NOT bond to other oxygen atoms if they can bond to carbon or hydrogen instead.Chemical energy is stored in bonds between atomsSome bonds (C-C and C-H) have high chemical energyOther bonds (C-O and O-H) have low chemical energy6
Slide7Making the reactant molecules: carbon dioxide and water
Complete Step 1 in Part B of your worksheet.7
Slide88
Photo of reactant molecules: CO2 (carbon dioxide) and H2O (water)Start by making the molecules of the reactants and energy units of light. Put them on the reactants side, then rearrange the atoms and energy units to show the products.
Remember:
Atoms last foreve
r (so you can rearrange atoms into new molecules, but can’t add or subtract atoms).
Energy lasts forever
(so you can change forms of energy, but energy units can’t appear or go away).
Chemical change
Reactants
Products
Water
Carbon dioxide
Slide9Important: When you are finished constructing the reactants, put all extra pieces away.
9
Slide10Record your resultsRecord your results for your reactants
.10
Slide11Rearranging the Atoms to Make Product Molecules: Glucose and OxygenComplete
Step 2 in Part B of your worksheet.11
Slide1212
Photo of product molecules: H6C12O6 (glucose) and O2 (oxygen)Start by making the molecules and energy units of the reactants and putting them on the reactants side, then rearrange the atoms and energy units to show the products..
Remember:
Atoms last foreve
r (so you can rearrange atoms into new molecules, but can’t add or subtract atoms).
Energy lasts forever
(so you can change forms of energy, but energy units can’t appear or go away).
Reactants
Products
Glucose
Oxygen
Chemical change
Slide1313
Comparing photos of reactant and product moleculesCompare the atoms and energy units on the reactant and products sides..
Remember:
Atoms last foreve
r (so you can rearrange atoms into new molecules, but can’t add or subtract atoms).
Energy lasts forever
(so you can change forms of energy, but energy units can’t appear or go away).
Reactants
Products
Glucose
Oxygen
Chemical change
Water
Carbon dioxide
Slide14Record your resultsRecord your results for your products
.14
Slide15Chemical change
Reactants
Glucose
Oxygen
Products
Water
Light energy
Carbon Dioxide
15
What happens
to atoms and energy
in photosynthesis?
Slide16Chemical change
Reactants
Glucose
Oxygen
Products
Water
Light energy
Carbon Dioxide
What happens
to carbon atoms
in photosynthesis?
Carbon atoms in carbon dioxide become part of glucose molecules.
16
Slide1717
Chemical change
Reactants
Glucose
Oxygen
Products
Water
Light energy
Carbon Dioxide
Oxygen and hydrogen atoms become part of glucose and oxygen gas molecules
.
What happens to oxygen and hydrogen atoms in photosynthesis?
Slide1818
Chemical change
Reactants
Glucose
Oxygen
Products
Water
Light energy
Carbon Dioxide
What happens
to light energy
in photosynthesis?
Light energy is transformed into chemical energy.
Slide1919
Chemical change
Reactants
Glucose
Oxygen
Products
Water
Light energy
Carbon Dioxide
Atoms last forever! Energy lasts forever!
What happens
to atoms and energy
in photosynthesis?
Slide20Discuss with the classDid the number and type of atoms stay the same at the beginning and end of the chemical change? ____
Did the number of twist ties (representing energy) stay the same at the beginning and end of the chemical change? ____Why do the numbers of atoms and twist ties have to stay the same?20
Slide21Writing a Chemical EquationChemists use
chemical equations to show how atoms of reactant molecules are rearranged to make product moleculesWriting the equation in symbols: Chemists use an arrow to show how reactants change into products:[reactant molecule formulas] product molecule formulas]Saying it in words: Chemists read the arrow as “yield” or “yields:”[reactant molecule names] yield [product molecule names]Equations must be balanced: Atoms last forever, so reactant and product molecules must have the same number of each kind of atomTry it: can you write a balanced chemical equation to show the chemical change when animals move (use energy)?21
Slide2222
Chemical equation for photosynthesis
6 CO
2 + 6 H2O
C6
H12O6 + 6O2
(in words: carbon dioxide reacts with water to yield glucose and oxygen)
Today's Top Docs
Related Slides
World War 3 will start in 2020. ???
Risk Management For a Small Business
Gate Drivers Presenter: Bipolar Business
Understanding a New Era of Strategic Com
Carbon: Transformations in Mat
Carbon: Transformations in Mat
Carbon: Transformations in Mat
Carbon: Transformations in Mat
Carbon: Transformations in Mat
1 Carbon: Transformations in M
Carbon: Transformations in Mat
Carbon: Transformations in Mat
Carbon: Transformations in Mat