Photosynthesis Virtual Lab

Name: Alma Oscarson________  Date: 10-14-15________ Period: 4____

Photosynthesis Virtual Labs.

Lab 1: Glencoe Photosynthesis Lab

http://www.glencoe.com/sites/common_assets/science/virtual_labs/LS12/LS12.html

Analysis Questions

1. Make a hypothesis about which color in the visible spectrum causes the most plant growth and which color in the visible spectrum causes the least plant growth?

If red and blue are absorbed more by the plant then red and blue will be the most effective and green will cause the least plant growth.

2. How did you test your hypothesis? Which variables did you control in your experiment and which variable did you change in order to compare your growth results?

I tested all of the colors on the different plants and got the average growth. They had the same amount of days to grow but the light were different.

Results:

Filter Color	Spinach Avg. Height (cm)	Raddish Avg. Height (cm)	Lettuce Avg. Height (cm)
Red	18.3	13	11
Orange	14.6	8	6.6
Green	2	1.3	3
Blue	19	15	12.3
Violet	17	10	8.6

3. Analyze the results of your experiment. Did your data support your hypothesis? Explain. If you conducted tests with more than one type of seed, explain any differences or similarities you found among types of seeds.

My data did support our data because i said that blue and red light would cause the most plant growth and it did, and the green did the least plant growth which i thought.

4. What conclusions can you draw about which color in the visible spectrum causes the most plant growth?

That blue and red are absorbed more by the plant which causes the plant to grow more.

5. Given that white light contains all colors of the spectrum, what growth results would you expect under white light?

I would expect that the plant would grow fast because it has both blue and red light which causes the plant to grow more

Site 2: Photolab

http://www.kscience.co.uk/animations/photolab.swf

This simulation allows you to manipulate many variables. You already observed how light colors will affect the growth of a plant, in this simulation you can directly measure the rate of photosynthesis by counting the number of bubbles of oxygen that are released.

There are 3 other potential variables you could test with this simulation: amount of carbon dioxide, light intensity, and temperature.

Choose one variable and design and experiment that would test how this factor affects the rate of photosynthesis. Remember, that when designing an experiment, you need to keep all variables constant except the one you are testing. Collect data and write a lab report of your findings that includes:

• Question
• Hypothesis
• Experimental parameters (in other words, what is the dependent variable, independent variable, and control?)
• Data table
• Conclusion (Just 1st and 3rd paragraphs since there's no way to make errors in a virtual lab)

*Type this document on a word processor or in Google Docs and submit via Canvas.

Question: How does temperature affect photosynthesis and the number of bubbles.

Hypothesis: If a medium like 25-30 degrees help plants grow faster than the medium temperature will make more bubbles.

Experimental parameters: The control in this experiment is 10 degrees of celcius. The dependent variable in this experiment is the amount of bubbles in 1 minute. The independent variable is the degree of temperature.

Degrees of celcius	10 degrees	25 degrees	40 degrees
Amount of bubbles in 1 minute	12	40	33

Unit 3 Reflection

Unit 3 Reflection

Unit 3 was about the basic unit of life, cells. It also explained the process of photosynthesis and cellular respiration. Euakaryotes is a cell with a nucles, while a prokaryotes cell doesnt have a nucleus which makes it less complex and smaller. It also included all the parts in the cell and how they help with both photosynthesis and cellular respiration but also other important processes. My strengths were about how the cell works and what makes a cell. My weaknesses were photosynthesis and cellular respiration cycles. These were my weaknesses because they were so complex and you had to know everything to understand it.

I  learned how everything we do, like moving our fingers or breaking down food is all up to the cells. They do everything in the body and are the basic units of life. But I also learned how important cellular respiration and photosynthesis are.

I think Iam a better student today because I now understand how all the cycles and cells work. I don't have any unanswered questions that i need answered.

for studying, Im planning to read over the vodcasts, and look through the chapter notes we did. And also do the practice tests in the book, but also do diagrams and fill in the information. 

Egg Diffusion Lab

For this lab called egg diffusion lab, we had to put 2 eggs in vinegar for 48 hours or more to break down the egg's membrane. After this was done we had to measure the eggs mass and circumference. Then we put one egg in deionized water, and the other in sugar water (corn syrup). After they had been in the liquids for 48 hours we washed the eggs off and measured the mass and circumference again to see what the difference was from the original egg to the egg that had been in sugar water and water.. And we could see how the egg's membrane that was in the sugar water had shriveled up, and water had been diffused from the egg.

When the concentration of sugar water was increased the mass and circumference decreased. This happened because the water diffused from the egg and went from a high concentration to a low concentration, because there was more hypertonic in the egg than in the fluid. And there was more solute in the sugar and more solvent in the water. The difference of circumference was -21.3% and for mass it was -52.4%.

    A cell's internal environments changes at the same time as the external environment because if water is diffused into the sugar both external and internal, losses and gains solvent and solute, so the concentration changes for both. This happens because if one thing changes both have to change.

This demonstrates the biological principle of Diffusion and also Passive diffusion. And we have learned about these in our vodcasts, CFU and in the class.

Fresh vegetables are sprinkled with water at markets, because the water gets diffused into the plant, and keeps it from losing water and getting wrinkly. Salting to the plants along the road makes them lose water and gain salt, so the cell shrivels up, and to die.

After doing this experiment I would want to test what different liquids like salt water, or soda would do to the egg and not just sugar water. I would want to test this because it would be interesting to know which substances changes the eggs cells internal environment, but also how the liquid would be changed.

Class Data: control (DI Water)                                                            Percent change

Group #	1	2	3	4	5	6	7	AVG
% Change in mass		-38.4%	4.5%	N/A	.76%	6.4%	.58%	3.06%
% Change in Circumference		-20.7%	0%	N/A	.2%	0%	0%	0.5%

                            Group 2, had a little sugar mixed in with the water, so it isn't accurate

Class Data: Sugar Water                                                       Percent Change

Group #	1	2	3	4	5	6	7	AVG
% Change In Mass		-42.7%	-48.5%	-46.5%	-56.5%	-62.4%	-46.5%	-52.04%
% Change In Circumference		-30.3%	-23.3%	-25%	-1.5%	-11.1%	-15.38 %	-21.3%

Egg macromolecule lab

In this lab we asked the question, can macromolecules be identified in an egg cell. For the egg membrane we got that polysaccharides was present. We got this because the color changed to black and with a color change of 4. And we know that polysaccharide might be present there because carbohydrates are always present on the surface of the cell. For the egg white we got that protein was present because the color changed to a very dark blue, almost purple. And we know that it should be present in the egg white because proteins are used for development and enzymes. For the egg yolk part of the cell we got that monosaccharides are present because the color changed to green/yellow. They should are present there because they are used for energy. This supports our claim because we thought that all of these macromolecules would be present where they are, like proteins had a color change of 6 in the egg yolk so it is present, while monosaccharides had a color change of only 3 so it is not present.

One error that might have affected our results was that out egg broke. While Cameron was washing the egg, and taking the white layer of shell off she pressed on the egg a little to hard so the egg popped. And due to this we had to use a pipet to suck up the egg white, and use a spoon to pick up the egg yolk. This might have our results because the egg yolk and white might have gotten mixed together, so when we tested we tested on a mix of egg white and egg yolk. A second error that we did was when we were getting the amount of egg yolk we needed, we took too much because we couldn't get the right amount. And this might have affected it so the color didn't change as much as it would because we had too much yolk and to little of the things we would add to it. In future experiments we could have been more careful on washing the egg or handling fragile items carefully and take more time to measure the amount needed.

The purpose of this lab was to show how different macromolecules can be present in so many things in a egg or in like a  animal or plant. This relates to the egg diagram that we did in class and also the vodcasts. This lab could be applied to real life situations by knowing what macromolecules you would need to eat to grow and help your cells.