3/15 Tuesday

Agenda:

-Plant of the day

-Photosynthesis review

-Photosynthesis Quiz

-Work on homework

Today in Biology, it was a simple day. We first reviewed the plant of the, which was a moss ball. Remember, it is no moss. It forms in specific lakes in Japan, Iceland, Scotland, and Estonia. They're not plants, they're algae. Moss balls are adapted to low light. Chloroplats are dormant unless the ball breaks apart.

Next, we reviewed photosynthesis, light reactions and everything we needed to know for our quiz.

After, the quiz Mrs. Stein gave us time to complete our homework.

Homework:

-Read 23.2 (669-671) and (674-677) w/ a Double Bubble Map "Root vs. Stem"

-National Park Project due 3/23

The next scribe is Aleko

3/14

Agenda

*Plant of the day

*Discuss pigment lab

*Finish photosynthesis (go over UP 81-85)

*Factors influencing photosynthesis UP 73-76

Homework

*UP 93-76

*Quiz tomorrow on photosynthesis

*National Park presentation due 8am on 3/23

Our homework for UP 73-76 is a lab but you don't need to have been in class to do it. The idea is that there is a lamp and a plant soaking in water. You put the lamp either close to the plant, or far away. Then, you look at the bubbles coming from the water that the plant is in and if there are more bubbles, more photosynthesis is being done. If there are less bubbles, less photosynthesis is being done. We know this because oxygen is a product of photosynthesis. You are supposed to compare and contrast the amount of photosynthesis/bubbles there are when the lamp is close to the plant or far away form the plant. On page 74, the chart is: Trial 1: 50 bubbles, 27 bubbles, and 78 bubbles. Trial 2: 62 bubbles, 24 bubbles, and 84 bubbles. Mrs. Stein gave us the answers to that chart because we are not actually doing the lab. Now, you just need to find the averages and do the rest of the pages.

 

We got back our Pigment lab and UP 81-85.

Pigment lab

We discussed the pigment lab in class. We decided that just because it looks like chlorophyll is the only pigment, doesn't mean that it is. There are many other pigments in leaves that are just not visible because chlorophyll over powers them. When the weather changes, chlorophyll breaks down and the other pigments (which were always there - you just couldn't see them) begin to show through.

UP 81-85 answers:

1. The light-dependent reactions take place within the thykloid membranes.

2. The light-independent reactions are also known as the Calvin Cycle

3. The energy carriers NADPH and ATP are produced during the light-dependent reactions.

4. In the light-dependent reactions, the gas oxygen is produced.

5. High-energy sugars are produced during the light independent reactions.

6. The light independent reactions take place in the stroma.

8. If there is no light coming into the chloroplasts, how will this affect the Calvin cycle? The Calvin cycle will NOT be affected because it is light independent, it doesn't need the light.

9. What effect does weather have on the process of photosynthesis? Photosynthesis will be slowed down if there is no sun or the temperature is too cold.

10. If you place a plant in a clear, sealed box, how could you use a measurement of the gases in the boxed air to measure the rate of photosynthesis? What gas would you measure? You would measure oxygen and/or carbon dioxide because oxygen is a product of photosynthesis and carbon dioxide is used in photosynthesis. So, if there was a lot of oxygen and a little carbon dioxide, you would be able to measure the rate of photosynthesis.

**NOTES**

Plant of the Day:

Sensitive Plant (Mimosa pudica)

We learned that the plant is sensitive to touch and when you touch it, the leaves cu

rl inwards. Scientists are not sure exactly why the plant does this. It might be a defense mechanism.

Electron Carriers

*Light energy "excites" electrons in chloroplasts

Light Reaction

*Chlorophyll absorbs light, and electrons become energized

*Water splits to produce H+ and O2

*Electron lose energy to form ATP

*ATP then goes to the Calvin Cycle

*H+ and NADP form NADPH

*these carry energy to Calvin Cycle

Calvin Cycle

*CO2 is added to a 5 carbon sugar

*Energy from NADPH and ATP are used to carry out reactions

*Produces glucose

It is REALLY important to know and understand this diagram of photosynthesis! Remember:

*This diagram takes place in the chloroplast.

*The light reaction takes place in the thykloid.

*A stack of thykloids is called a granum.

*The empty space in the chloroplast is called the stroma.

The next scribe is Steven.

Chlorophyll Thursday and National Park Friday

Thrsday:
-Schedule:
1. Got a stamp for UP 67-68
2. Took Notes on Photosynthesis
3. Pigment lab

-Homework:
1. Finish Lab Analysis Questions
2. Read section 8.2 and 8.3 in the textbook and do a reading strategy of your choice or UP 81-85
3. Work on your national parks project

-The notes:
PHOTOSYNTHESIS OVERVIEW:
.Reactants: CO2, H2O, light energy
.Products: O2, C6H12O6
.Two reactions:
-Light reaction
-Calvin Cycle (light independent reaction)
.Chloroplast Structure:
-Thylakoid sacs contain chlorophyll
-Granum: Stacks of thylakoids
-light rxn
-Stroma: open space
-Calvin cycle

After we took notes we started the pigment lab (UP 69-72)
-We started by taking 2 leaves (a Spinach Leaf and a Coleus Leaf)
-We rolled a dime over the leave so that we could get pigments onto a Chromatography paper
-We then rolled dup our paper, stapled it, and put it into a substance for 10 minutes.
-When we took the piece of paper out, we saw many layers of colors
-These colors were the pigments found in the plant.
-On the paper with the pigments of the spinach leaf the layers of colors went:
.Bright green
.Yellow green
.Bright green
.Yellow
.Faint yellow
-Then on the paper with the pigment from the Coleus leaf the layers of color were:
.Red
.Yellow green
.Green
.Faint yellow
.Yellow
This shows us that even though the leaf may appear to be green or red, there are many other pigments in the leaf. So just because the Coleus leaf appears to be red, there is still chlorophyll in it to help carry out photosynthesis.


Friday's ClassWe met in the classroom first to write down our homework and learn about power points

-Homework:
1. National Park DUE 3/23(UP 9)
2. Read pg 643+ pg 664-666
-I would suggest you take some notes because Ms.Stein will not go over the lesson in class
3. Review photosynthesis links (can be found on moodle)
-Before we went to the computer lab we learned about power points
1. Make sure the background color is:
-No too bright
-Colorful
-No too distracting
2. Make sure the font is:
-Big and easy to read
-The color does not blend into the background
-Try to follow the 5X5 rule (5 bullet pints and five words per bullet point on your slide
3. Make sure you don't make too many slides on animals
-Your information on animals should be short and brief whereas your information on plants should be longer and in detail

Friday was the last day of time that we would spend in class working on our project. From now on you should try to meet after school with your group to work on it.
Good Luck and sorry this was late!!

Pigment Lab Pictures



Spinach Leaf



Coleus Leaf

Terrific Tuesday

Plant of the day...

VENUS FLY TRAP (Dionaea muscipula)
Carnivorous-insectivore

THE PLANT KINGDOM

LEAVES
Leaves are the main photosynthetic organ in plants.
Blade- The flat part of the leaf
Petriole- the stem
cuticle-helps conserve water
3 types of tissue:
1) epidermis- protect the inner tissue
2)mesophyll- most of the photosynthesis takes place
3)vascular- were the xylem and the phloem

TODAY...
Today we did a leaf lab. The objectives of the lab is
1) to study the tissues that make up the leaves of a plant
2) examine the structure of a stomate

HOMEWORK

finish lab 25 "the structure of a leaf"

REMINDER

do research for the plant power point.

ALSO...

Tomorrow is twin day for Dr.Sues week

MICHEAL L is the next Scribe!