AP Biology Photosynthesis Lab

Photosynthesis is affected by light intensity, water, and temperature. Plants grow more abundantly because the weather is warm. Carbon Dioxide given off by animals is consumed by plants that replace the oxygen animals take it. Experimentation will help understanding how plants are vital because of the oxygen they release. If leaf disks in the experiment release oxygen, they will undergo photosynthesis and float. If there is no temperature buffer of water, the higher temperature will cause more leaf disks to float at a faster rate. (Experiment Central)
This lab required 100 ml of water, 3 grams of baking soda, several leaves, a single hole punch, a plastic syringe with a removable stopper, a beaker large enough to hold 100+ ml of liquid, a beaker large enough to block out the prior, a light fixture, and a thermometer.
This experiment began by preparing 100 ml of bicarbonate solution for each trial. To do this, 3g of baking soda was dissolved into 100ml of water. The bicarbonate served as an alternate dissolved source of carbon dioxide for photosynthesis. Then 12 leaflet disks (leaf chads) were cut for each trial. Single hole punches were used to cut these out. The disks were then placed in the bottom of an empty syringe. As the syringe filled with the bicarbonate solution, the leaf disks were immersed in the solution. A finger was placed over the opening of the syringe, and as the plunger was pulled down it created suction. The goal of this step was to create a vacuum, so the empty air pockets in the leaf chads that made them buoyant were filled with water (so they would sink).
The disks were poured into the 100ml solution, and sank to the bottom. The temperature of the water was recorded. A heat buffer that consisted of a larger beaker filled with water was placed in between the solution and the light fixture, and the light was then turned on. Over the course of 8 minutes the leaf chads underwent photosynthesis and began to float back to the surface of the water. The number of floating disks was recorded each minute and then the process was repeated without the heat buffer. While being repeated without the heat buffer, the temperature was checked every minute and recorded.
Data and Results:
The rate of photosynthesis was measured by floatation of leaf disks when oxygen was released. The hypothesis was not supported because the leaf disks did not float at a higher rate when the temperature was slightly higher. Figure 1 shows this because the rate of floating leaf disks did not increase as predicted. The change in heat did not affect the amount of floating leaf disks, perhaps due to a large margin of error. The margins for error include the clumps of leaf disks, too much water in the buffer, too many air pockets in the leaves and not having stronger temperatures. A follow up experiment would test the same leaf disks with a stronger heat source. This follow up would most likely support the current hypothesis.

Order a unique copy of this paper
(550 words)

Approximate price: $22

Basic features
  • Free title page and bibliography
  • Unlimited revisions
  • Plagiarism-free guarantee
  • Money-back guarantee
  • 24/7 support
On-demand options
  • Writer’s samples
  • Part-by-part delivery
  • Overnight delivery
  • Copies of used sources
  • Expert Proofreading
Paper format
  • 275 words per page
  • 12 pt Arial/Times New Roman
  • Double line spacing
  • Any citation style (APA, MLA, Chicago/Turabian, Harvard)

Our guarantees

We value our customers and so we ensure that what we do is 100% original..
With us you are guaranteed of quality work done by our qualified experts.Your information and everything that you do with us is kept completely confidential.

Money-back guarantee

You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.

Read more

Zero-plagiarism guarantee

The Product ordered is guaranteed to be original. Orders are checked by the most advanced anti-plagiarism software in the market to assure that the Product is 100% original. The Company has a zero tolerance policy for plagiarism.

Read more

Free-revision policy

The Free Revision policy is a courtesy service that the Company provides to help ensure Customer’s total satisfaction with the completed Order. To receive free revision the Company requires that the Customer provide the request within fourteen (14) days from the first completion date and within a period of thirty (30) days for dissertations.

Read more

Privacy policy

The Company is committed to protect the privacy of the Customer and it will never resell or share any of Customer’s personal information, including credit card data, with any third party. All the online transactions are processed through the secure and reliable online payment systems.

Read more

Fair-cooperation guarantee

By placing an order with us, you agree to the service we provide. We will endear to do all that it takes to deliver a comprehensive paper as per your requirements. We also count on your cooperation to ensure that we deliver on this mandate.

Read more

Calculate the price of your order

550 words
We'll send you the first draft for approval by September 11, 2018 at 10:52 AM
Total price:
The price is based on these factors:
Academic level
Number of pages