Plants and the making of food

1. OBJECTIVESOBJECTIVES
What is
photosynthesis?
What is
photosynthesis?
Why is photosynthesis
important?
Why is photosynthesis
important?
QUIZQUIZ
INTRODUCTIONINTRODUCTION
Test Yourself before
you begin!
Test Yourself before
you begin!
Integrated Science
Module 1  Unit 2  Lesson 3

2. OBJECTIVESOBJECTIVES
What is
photosynthesis?
What is
photosynthesis?
Why is photosynthesis
important?
Why is photosynthesis
important?
QUIZQUIZ
INTRODUCTIONINTRODUCTION
Test Yourself before
you begin!
Test Yourself before
you begin!
OBJECTIVESOBJECTIVES
When you complete this slide presentation,
you will be able to:
define photosynthesis.
write a word equation and a chemical
equation for the process of photosynthesis.
state the role of chloroplasts in
photosynthesis.
access information via the internet.

3. OBJECTIVESOBJECTIVES
What is
photosynthesis?
What is
photosynthesis?
Why is photosynthesis
important?
Why is photosynthesis
important?
QUIZQUIZ
INTRODUCTIONINTRODUCTION
Test Yourself before
you begin!
Test Yourself before
you begin!
Where do
plants get their
food from?
Where do
plants get their
food from?
INTRODUCTIONINTRODUCTION
Do they get food
from the soil or
from the air?
Do they get food
from the soil or
from the air?
Do plants
even need
or use food?
Do plants
even need
or use food?
Do plants
eat like
animals?
Do plants
eat like
animals?

4. OBJECTIVESOBJECTIVES
What is
photosynthesis?
What is
photosynthesis?
Why is photosynthesis
important?
Why is photosynthesis
important?
QUIZQUIZ
INTRODUCTIONINTRODUCTION
Test Yourself before
you begin!
Test Yourself before
you begin!
Test yourself:Test yourself: What do youWhat do you
know about how plants getknow about how plants get
food?food?On the next two slides you will find
a quiz with a total of eleven (11)
statements.
Read each statement.
If it is true, click TRUE. If it false,
click FALSE.
After completing the quiz, discuss
your answers with your teacher.
Then, click the FEEDBACK button
for additional information.
Click the next button to see the
quiz.

5. OBJECTIVESOBJECTIVES
What is
photosynthesis?
What is
photosynthesis?
Why is photosynthesis
important?
Why is photosynthesis
important?
QUIZQUIZ
INTRODUCTIONINTRODUCTION
Test Yourself before
you begin!
Test Yourself before
you begin!
So … What do you knowSo … What do you know
about how plants get food?about how plants get food?
1. Plants do not need food.
2. Plants make their own food.
3. Plant roots absorb food from the soil.
4. Plants use their own food made during
photosynthesis.
5. Plants absorb water and minerals from the soil
to make food.
6. Plants need Carbon dioxide from the air to
make their food.
TRUE FALSE
TRUE FALSE
TRUE FALSE
TRUE FALSE
TRUE FALSE
TRUE FALSE

6. OBJECTIVESOBJECTIVES
What is
photosynthesis?
What is
photosynthesis?
Why is photosynthesis
important?
Why is photosynthesis
important?
QUIZQUIZ
INTRODUCTIONINTRODUCTION
Test Yourself before
you begin!
Test Yourself before
you begin!
So ... What do you know aboutSo ... What do you know about
how plants get food?how plants get food?
7. Variegated leaves cannot make food.
8. Light is required for photosynthesis.
9. Oxygen is required for photosynthesis.
10. Plants produce glucose from photosynthesis.
11. Plants do photosynthesis in the day and respiration
at nights.
TRUE FALSE
TRUE FALSE
TRUE FALSE
TRUE FALSE
TRUE FALSE
FEEDBACKFEEDBACK

7. OBJECTIVESOBJECTIVES
What is
photosynthesis?
What is
photosynthesis?
Why is photosynthesis
important?
Why is photosynthesis
important?
QUIZQUIZ
INTRODUCTIONINTRODUCTION
Test Yourself before
you begin!
Test Yourself before
you begin!
Feedback to: So ... What do youFeedback to: So ... What do you
know about how plants getknow about how plants get
food?food?
1. Plants do not need food. All living things, including plants,
need food. That’s the life process called nutrition.
2. Plants make their own food. Yes they do! By a process
called photosynthesis!
3. Plant roots absorb food from the soil. No! plants do not
absorb food … they absorb water (+ mineral ions/salts like
magnesium, potassium). Water is one of the ‘raw
materials’ used in food-making or photosynthesis.
4. Plants use their own food made during photosynthesis.
Yes. Plants use the food they make for energy and as raw
materials to make their various body structures.
5. Plants absorb water containing mineral ions/salts from
the soil to make food. Yes they do!
6. Plants need Carbon dioxide from the air to make their
food. Plants use the Carbon from Carbon dioxide to
make sugars.

8. OBJECTIVESOBJECTIVES
What is
photosynthesis?
What is
photosynthesis?
Why is photosynthesis
important?
Why is photosynthesis
important?
QUIZQUIZ
INTRODUCTIONINTRODUCTION
Test Yourself before
you begin!
Test Yourself before
you begin!
Feedback to : So ... What do youFeedback to : So ... What do you
know about how plants getknow about how plants get
food?food?
7. Variegated leaves cannot make food. If this were true
then plants with those kinds of leaves would die! Food is
made in the green parts of variegated leaves.
8. Light is required for photosynthesis. The energy from
light is what is converted to energy in food by plants
9. Oxygen is required for photosynthesis. Oxygen is not
required, rather, it is produced.
10. Plants produce glucose from photosynthesis. Yes this
is the first product.
11. Plants do photosynthesis in the day and respiration at
nights. Whilst photosynthesis needs light to occur,
respiration can occur whether light is present or not – so
respiration occurs both in the day and night.
From the feedback to these questions, think
about how you would define photosynthesis.

9. OBJECTIVESOBJECTIVES
What is
photosynthesis?
What is
photosynthesis?
Why is photosynthesis
important?
Why is photosynthesis
important?
QUIZQUIZ
INTRODUCTIONINTRODUCTION
Test Yourself before
you begin!
Test Yourself before
you begin!
What is photosynthesis?What is photosynthesis?
Photosynthesis is the process by which most
green plants get their food.
Click below to see some unicellular organisms
that photosynthesize.
Note the green chloro-
plasts they contain!
http://www.youtube.com/watch?
v=Md0PtdRxXvw&feature=related
Multicellular green plants
that live both in aquatic
and terrestrial environ-
ments also have chloro-
plasts and make their
food by photosynthesis.
Green
Algae
http://www.fotosearch.c
om/photos-
images/ferns.html
Fern

10. OBJECTIVESOBJECTIVES
What is
photosynthesis?
What is
photosynthesis?
Why is photosynthesis
important?
Why is photosynthesis
important?
QUIZQUIZ
INTRODUCTIONINTRODUCTION
Test Yourself before
you begin!
Test Yourself before
you begin!
What is Photosynthesis?What is Photosynthesis?
Think carefully – What is this diagram telling you
about photosynthesis? Tell your teacher.
INPUTS
PRODUCTS
Note the ‘INPUTS’ and “PRODUCTS or OUTPUTS’

11. OBJECTIVESOBJECTIVES
What is
photosynthesis?
What is
photosynthesis?
Why is photosynthesis
important?
Why is photosynthesis
important?
QUIZQUIZ
INTRODUCTIONINTRODUCTION
Test Yourself before
you begin!
Test Yourself before
you begin!
What is Photosynthesis?What is Photosynthesis?
Photosynthesis can be summarized as a word equation:
You already know these chemical symbols: water = H2O,
Carbon dioxide = CO2 and Oxygen = O2. Note that glucose =
C6H12O6. How would you re-write the above word equation
for photosynthesis with chemical symbols? Try it!
Substrates or Reactants Product & By-product
produceCarbon dioxide Waterand Glucose and Oxygen
SHOW ME!SHOW ME!SHOW ME!SHOW ME!
CO2 H2O+ C6H12O6 + O2
SHOW ME!SHOW ME!SHOW ME!SHOW ME!
AND
EQUATIONS FOREQUATIONS FOR
PHOTOSYNTHESISPHOTOSYNTHESIS

12. OBJECTIVESOBJECTIVES
What is
photosynthesis?
What is
photosynthesis?
Why is photosynthesis
important?
Why is photosynthesis
important?
QUIZQUIZ
INTRODUCTIONINTRODUCTION
Test Yourself before
you begin!
Test Yourself before
you begin!
What is Photosynthesis?What is Photosynthesis?
EQUATIONS FOREQUATIONS FOR
PHOTOSYNTHESISPHOTOSYNTHESIS
Light energyLight energy
chlorophyllchlorophyll
The equation says: Six molecules of Carbon dioxide plus six
molecules of water in the presence of chlorophyll and sunlight
produce one molecule of glucose and six molecules of
Oxygen.
Answer: (a) The quantities of the ingredients, and (b) the
conditions under which the process occurs. Note that the
amount of elements balance on each side of the chemical
equation, shown below.
6CO2 6H2O+ C6H12O6 + 6O2
Read Box 3.1 in your SIM.
If you were relating the equations on the previous
slide to a recipe, what else would be needed?
CHECKCHECKCHECKCHECK

13. OBJECTIVESOBJECTIVES
What is
photosynthesis?
What is
photosynthesis?
Why is photosynthesis
important?
Why is photosynthesis
important?
QUIZQUIZ
INTRODUCTIONINTRODUCTION
Test Yourself before
you begin!
Test Yourself before
you begin!
What is Photosynthesis?What is Photosynthesis?
Photosynthesis is the process in which green plants
use water and Carbon dioxide and the energy of light
to produce a carbohydrate e.g. glucose, in which
energy is stored, and during the process they give off
Oxygen.
CHECKCHECK
It is thought that photosynthesis is the most important
reaction in the world!
What is photosynthesis? Discuss it in your group, then
type your response in the box below.
You must be in Slide Show View to type and delete text.
Click CHECK for Feedback.

14. OBJECTIVESOBJECTIVES
What is
photosynthesis?
What is
photosynthesis?
Why is photosynthesis
important?
Why is photosynthesis
important?
QUIZQUIZ
INTRODUCTIONINTRODUCTION
Test Yourself before
you begin!
Test Yourself before
you begin!
Why is photosynthesis soWhy is photosynthesis so
important?important? -- Food and fuel forFood and fuel for
living thingsliving things“The ability to capture the energy of sunlight to make
glucose puts plants at the bottom of the food chain,
making them the producers of the energy needed for
much of life on earth.”
When animals eat, they get food and their
energy or ‘fuel’, either directly or indirectly from
green plants that carry on photosynthesis!
When animals eat, they get food and their
energy or ‘fuel’, either directly or indirectly from
green plants that carry on photosynthesis!
“Even the ‘waste’ product of photosynthesis, i.e., oxygen,
is necessary for animals to survive. Hundreds of millions of
years ago, the earth’s atmosphere was mostly carbon
dioxide. Thanks to photosynthesis, there’s now enough
oxygen to sustain animal life.”
Watch this clip > http://www.youtube.com/watch?
v=pmebLsHPbsU

15. OBJECTIVESOBJECTIVES
What is
photosynthesis?
What is
photosynthesis?
Why is photosynthesis
important?
Why is photosynthesis
important?
QUIZQUIZ
INTRODUCTIONINTRODUCTION
Test Yourself before
you begin!
Test Yourself before
you begin!
REVIEW and QUIZREVIEW and QUIZ
Are you ready to test yourself?
There are three (3) Multiple Choice
items that you are required to do. For
each item, click on the letter of the
correct response and then click the
button ‘NEXT QUESTION’ to continue.
There are also two (2) Review Questions
for you to answer.
Click BEGIN QUIZ to start.
BEGIN QUIZ!BEGIN QUIZ!

16. OBJECTIVESOBJECTIVES
What is
photosynthesis?
What is
photosynthesis?
Why is photosynthesis
important?
Why is photosynthesis
important?
QUIZQUIZ
INTRODUCTIONINTRODUCTION
Test Yourself before
you begin!
Test Yourself before
you begin!
QUIZ: Question 1QUIZ: Question 1
In the overall equation for photosynthesis,
six molecules of carbon dioxide are used
up and six molecules of ______ are
produced.
A. waterA. water
B. glucoseB. glucose
C. starchC. starch
D. oxygenD. oxygen
FEEDBACKFEEDBACKFEEDBACKFEEDBACK

17. OBJECTIVESOBJECTIVES
What is
photosynthesis?
What is
photosynthesis?
Why is photosynthesis
important?
Why is photosynthesis
important?
QUIZQUIZ
INTRODUCTIONINTRODUCTION
Test Yourself before
you begin!
Test Yourself before
you begin!
QUIZ: Feedback to Question 1QUIZ: Feedback to Question 1
In the overall equation for photosynthesis,
six molecules of carbon dioxide are used
up and six molecules of D = Oxygen are
produced.
NEXT QUESTIONNEXT QUESTIONNEXT QUESTIONNEXT QUESTION
A - water is a reactant not a product; it is a
substrate.
B - only one molecule of glucose is produced.
C – starch is not formed directly from
photosynthesis; glucose is formed.
D – six molecules of Oxygen are produced.

18. OBJECTIVESOBJECTIVES
What is
photosynthesis?
What is
photosynthesis?
Why is photosynthesis
important?
Why is photosynthesis
important?
QUIZQUIZ
INTRODUCTIONINTRODUCTION
Test Yourself before
you begin!
Test Yourself before
you begin!
QUIZ: Question 2QUIZ: Question 2
Plants trap the energy from the sun with
light-absorbing molecules called ____ .
A. waterA. water
D. mesophyllD. mesophyll
C. chloroplastsC. chloroplasts
B. chlorophyllB. chlorophyll
FEEDBACKFEEDBACKFEEDBACKFEEDBACK

19. OBJECTIVESOBJECTIVES
What is
photosynthesis?
What is
photosynthesis?
Why is photosynthesis
important?
Why is photosynthesis
important?
QUIZQUIZ
INTRODUCTIONINTRODUCTION
Test Yourself before
you begin!
Test Yourself before
you begin!
Quiz: Feedback to Question 2Quiz: Feedback to Question 2
Plants trap the energy from the sun with
light-absorbing molecules called B =
chlorophyll.
A – water is not a light absorbing molecule; it is
one of the substrates in the process of
photosynthesis.
B – chlorophyll is a pigment that absorbs light.
C – chloroplasts are where the chlorophyll
pigment is located.
D – mesophyll is the middle layer of tissue in
leaves in which chloroplasts are located.
NEXT QUESTIONNEXT QUESTIONNEXT QUESTIONNEXT QUESTION

20. OBJECTIVESOBJECTIVES
What is
photosynthesis?
What is
photosynthesis?
Why is photosynthesis
important?
Why is photosynthesis
important?
QUIZQUIZ
INTRODUCTIONINTRODUCTION
Test Yourself before
you begin!
Test Yourself before
you begin!
QUIZ: Question 3QUIZ: Question 3
If carbon dioxide is removed from a plant’s
environment, what would be the effect on
the plant’s ability to produce sugars?
A. More sugars will be produced.A. More sugars will be produced.
D. The same number of sugars will be
produced as oxygen will replace carbon
dioxide.
D. The same number of sugars will be
produced as oxygen will replace carbon
dioxide.
B. The same amount of sugars will be
produced.
B. The same amount of sugars will be
produced.
C. Less sugars will be produced.C. Less sugars will be produced.
FEEDBACKFEEDBACKFEEDBACKFEEDBACK

21. OBJECTIVESOBJECTIVES
What is
photosynthesis?
What is
photosynthesis?
Why is photosynthesis
important?
Why is photosynthesis
important?
QUIZQUIZ
INTRODUCTIONINTRODUCTION
Test Yourself before
you begin!
Test Yourself before
you begin!
Quiz: Feedback to Question 3Quiz: Feedback to Question 3
If carbon dioxide is removed from a plant’s
environment, what would be the effect on
the plant’s ability to produce sugars?
NEXT QUESTIONNEXT QUESTIONNEXT QUESTIONNEXT QUESTION
Option C is the only plausible response. Carbon
dioxide provides both carbon and oxygen to
make glucose. No other molecule can replace
carbon dioxide.

22. OBJECTIVESOBJECTIVES
What is
photosynthesis?
What is
photosynthesis?
Why is photosynthesis
important?
Why is photosynthesis
important?
QUIZQUIZ
INTRODUCTIONINTRODUCTION
Test Yourself before
you begin!
Test Yourself before
you begin!
Review Question 1Review Question 1
In the box below, write a word equation for
photosynthesis. You must be in Slide Show
View to type and delete text.
Click CHECK to read the Feedback.
Carbon dioxide and water in the presence of light and
chlorophyll, produce glucose and oxygen.
CHECKCHECKCHECKCHECK

23. OBJECTIVESOBJECTIVES
What is
photosynthesis?
What is
photosynthesis?
Why is photosynthesis
important?
Why is photosynthesis
important?
QUIZQUIZ
INTRODUCTIONINTRODUCTION
Test Yourself before
you begin!
Test Yourself before
you begin!
Review Question 2Review Question 2
In your notebook, write the narration for
the video at:
http://www.youtube.com/watch?
v=prFaSe3s9e0

24. OBJECTIVESOBJECTIVES
What is
photosynthesis?
What is
photosynthesis?
Why is photosynthesis
important?
Why is photosynthesis
important?
QUIZQUIZ
INTRODUCTIONINTRODUCTION
Test Yourself before
you begin!
Test Yourself before
you begin!
CREDITSCREDITS
http://www.nbclearn.com/chemistrynow/week9
http://www.youtube.com/watch?v=eelswM2YP_k
http://www.youtube.com/watch?
v=IlmgFYmbAUg&NR=1&feature=endscreen