photosynthesis &cellular respirationcellular respiration activity •students will compare and...
TRANSCRIPT
PHOTOSYNTHESIS &CELLULAR RESPIRATION
Mrs. Green
Bell work• 1) What type of organism would Most likely benefit directly from increased levels
of 𝐶𝑂2?a) Fish
b) Bird
c) Tree
d) Mushroom
• 2) Which of these is a product of Photosynthesis and a requirement of cellular respiration? a) Carbon dioxide
b) Glucose
c) Water
d) Sunlight
• 3) Which of these is produced during photosynthesis?
a) Amino Acid
b) Glucose
c) Glycerol
d) Carbon Dioxide
Photosynthesis• Nearly all living things obtain energy either directly or
indirectly from the energy of sunlight captured during the day.
• Photosynthesis= is a process by which a cell captures energy in sunlight and uses it to make food.
• Plants such as grass use energy from the sun to make its own food, therefore its called an Autotroph. They are also called a producer
• A caterpillar obtains energy from eating the grass and a bird obtains energy by feeding on the caterpillar. These organisms which cannot make their own food are called Heterotrophs. They are also called consumers.
Photosynthesis
• During photosynthesis
autotrophs use the sun’s
energy to convert carbon
dioxide (C𝑂2) and water (𝐻2𝑂)
into oxygen (𝑂2) and sugars
(𝐶6𝐻12𝑂6)
• Photosynthesis Equation:
• 6𝐶2 + 6𝐻2𝑂 → 𝐶6𝐻12𝑂6 + 6𝑂2
• (This is a Chemical reaction
happening inside the plant)
Two stages of Photosynthesis:
• Stage 1: Capturing the Sun’s Energy
• The process occurs mostly in leaves
• Chloroplast in plant cells capture energy using photosynthesis pigment called Chlorophyll.
• Energy powers stage 2
• Stage 2: Using energy to make food
• Cells need 𝐻2𝑂 and 𝐶𝑂2 for this stage. 𝐶𝑂2 enters through the Stomata, H2O enters through the roots.
• 𝐶𝑂2 and H2O undergo a chemical reaction in the chloroplast to produce sugars (𝐶6𝐻12𝑂6) and Oxygen which exit the leaves through the stomata.
Example:
• When you have many fish in
a tank how do they get
oxygen?
• How do you add more
oxygen to the tank?
Bell work:1) During photosynthesis, plants convert sunlight into what substance to be used for energy?
a) Oxygen
b) Carbon dioxide
c) Iron sulfide
d) Glucose
2) Which of the following BEST describes the flow of energy in a cabbage plant?
a) Solar energy is absorbed by mitochondria, converted and stored in sugars, and released in
chloroplasts
b) Solar energy is absorbed by chloroplasts, converted and stored in sugars, and released in
mitochondria.
c) Chemical energy is absorbed by chloroplast, stored in sugars, and released in mitochondria.
d) Chemical energy is absorbed by mitochondria, stored in sugars, and released in chloroplasts.
3) What is chlorophyll and how does it help plants?
a) Chlorophyll is a pigment that absorbs light energy and makes glucose
b) Chlorophyll is a protein that changes shape in the presence of sunlight
c) Chlorophyll is a receptor that binds carbon dioxide to light
d) Chlorophyll is an enzyme
Photosynthesis Activity
• This activity is on Photosynthesis.
• Students will make a pop-up visual representation of photosynthesis, using cut outs,
color and descriptions to identify the reactions and products of the process.
• I have included the cut-outs for the lead pop-up, descriptive arrows and plant
organelles along with a homework assignment.
• Directions:
• Cut out the full leaf and half-leaf on the paper I have passed out.
• Cut the slit in the full leaf on the marked line and insert the half leaf tab in slit
• Glue only the left side of the full leaf into your notebook and glue the tab of the half leaf in your
notebook
• The 2nd page I have handed out, cut and color the information arrows and leaf structures.
• Place arrows and structures on the leaf where they go according to photosynthesis.
Cellular Respiration
• Respiration= the process by which cells obtain energy from
glucose by breaking down simple food molecules. Such as sugar
and releasing the stored energy.
• Cellular respiration is different than the term “respiration” which is
used for breathing.
The Respiration Equation
•𝐶6𝐻12𝑂6 + 6𝑂2 6𝐶𝑂2 + 6𝐻2𝑂 + 𝐸𝑛𝑒𝑟𝑔𝑦
Comes from
the food we
eat
Comes from
the air or
water during
respiration
Notice the
equation is
opposite of
Photosynthesis
Bell work:1) When animals use energy, what is always produced?
a) Sugar
b) Heat
c) Oxygen
d) Starch
2) Which of the following is produced during the process of cellular respiration?
a) Carbon Dioxide
b) Sodium Chloride
c) Oxygen
d) Sugar
3) A mouse’s rate of carbon dioxide output increased. Which of the following MOST likely
happened?
a) The mouse went to sleep
b) The mouse ate some food
c) The mouse started running
d) The moues detected an odor
Cellular Respiration Equation cont.
•Equation in words:
•Glucose + Oxygen Carbon Dioxide + Water + Energy
•Again notice that this is the same equation as
photosynthesis but backwards****
Two stages of Cellular Respiration
• Stage 1:
• In the Cytoplasm glucose is
broken down into smaller
molecules.
• Oxygen is NOT involved and
only a small amount of energy
is released.
• Stage 2:
• Takes place in the Mitochondria.
• There molecules are broken
down even further by chemicals
reactions.
• These chemical reactions require
oxygen and release a great deal
of energy. Carbon dioxide and
water are also released, in most
animals these two products
leave the body by exhaling.
Cellular Respiration Activity
• Students will compare and contrast photosynthesis and cellular respiration by
filling in the missing information in the provided table.
• Items include identifying reactants and products of equations, organelles
responsible for reactions, and advantages and disadvantages of each
process for an organism.
• Directions:
• Cut out the table provided in class and glue into your notebook.
• Once you have glued the table into your notebook, start filling it out by
using your notes.
• Teacher will be coming around to check.
Videos
• https://florida.pbslearningmedia.org/resource/tdc02.sci.life.stru.photosynth/photosynth
esis/#.WetdSmhSzIU Nova photosynthesis video
• https://www.youtube.com/watch?v=pdgkuT12e14 Bill Nye video
• http://www.sites.ext.vt.edu/virtualforest/modules/photo.html Interactive Photosynthesis
Lab done in class
Test:• I will be handing out the post-test
• My expectations are:
• Once the test is handed out every one is absolutely quite and respect other students who
are still taking the test.
• No writing on my class set of the test!
• The purpose of a pre-test is to see what information you know and don’t know about this
unit.
• Once you have completely the test raise your hand and I will come get the test.
• Please sit quietly while you wait! You may color or read a book if you have one.
• Once everyone has finished we will start are new lesson