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Lab: Exploring the Rate of Photosynthesis - The Biology …

The lab uses blackworms () to test the effects of different drugs/chemical on heart rate.

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Hello,
Thanks for the great resources. I didn't realize before I started to use the photosynthesis and respiration minds-on activities that these lessons were designed for classrooms with limited internet access, and I wanted to add my two-cents about that. I do have regular internet access in a computer lab or with a laptop cart, and most students now have a mobile device that they can share with others. Web activities and quests are great, but I find that with these minds-on activities (I like that term a lot), my students are more likely to read carefully, study diagrams, refer to previous lessons, and are overall more engaged than if they were using screen time to accomplish similar learning tasks. I use these activities using a POGIL style approach, and my students have a much deeper understanding of these difficult topics - and they enjoy the opportunity to work on them together. I would encourage more teachers who are concerned about students obtaining a deep understanding of biological topics to steer clear of flashier web based applications and make some of these resources work for their classrooms (thank you for publishing the resources in Word so it is easier to do this). I wish I had found them years ago!
Ben

In this experiment we were told that we would be measuring the rate of photosynthesis.

As Trump pursues an “America First” strategy and sings the praises of “beautiful, clean coal”, China is looking for ways to collaborate with other countries on tackling climate change.

Free rate of photosynthesis papers, essays, and research papers.

Photosynthesis need light to work, so light therefore should speed up the rate of photosynthesis.

Prediction : I predict that as I increase the distance between the light source and the Canadian Pondweed (reducing the light intensity), the volume of oxygen produced within the time limit (the measure of the rate of photosynthesis) will decrease.

In the first part of this activity, students learn how to use the floating leaf disk method to measure the rate of net photosynthesis (i.e. the rate of photosynthesis minus the rate of cellular respiration). They use this method to show that net photosynthesis occurs in leaf disks in a solution of sodium bicarbonate, but not in water. Questions guide students in reviewing the relevant biology and analyzing and interpreting their results. In the second part of this activity, student groups develop hypotheses about factors that influence the rate of net photosynthesis, and then each student group designs and carries out an investigation to test the effects of one of these factors. (NGSS)

affects the rate of photosynthesis

Aim: To see if raising the light intensity increases the rate of photosynthesis.

One of ten national laboratories overseen and primarily funded by the Office of Science of the U.S. Department of Energy (DOE), Brookhaven National Laboratory conducts research in the physical, biomedical, and environmental sciences, as well as in energy technologies and national security. Brookhaven Lab also builds and operates major scientific facilities available to university, industry and government researchers. Brookhaven is operated and managed for DOE's Office of Science by Brookhaven Science Associates, a limited-liability company founded by the Research Foundation for the State University of New York on behalf of Stony Brook University, the largest academic user of Laboratory facilities, and Battelle, a nonprofit applied science and technology organization.

Having isolated and identified pigments found in chloroplasts, you can now determine the wavelengths of light transmitted by each pigment and then by all the pigments in the chloroplast extract. There was a slight change from the laboratory manual during this exercise because we used an extract containing all the pigments as opposed to working with each pigment separately. A graph was constructed using the absorbance of the extract at varying wavelengths. The goal of this exercise was to discover at what wavelengths do the chloroplast pigments absorb the greatest amount of light. An ideal graph would be similar to the following:

Prediction:I predict that raising the light intensity will increase the rate of photosynthesis.
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  • The effect of light intensity on the rate of photosynthesis

    I am trying to find out if the distance of the pond-weed from a lamp will change the rate of photosynthesis.

  • The effect of light intensity on the rate of photosynthesis ..

    Hypothesis: The rate of photosynthesis in the water plant hydrilla will change as the rate of carbon dioxide changes.

  • Photosynthesis Lab - The Official Web Page of Jason Franks

    I separate out mitosis to its own lab and bring in the issue of loss of regulation of mitosis leading to cancer.

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Question: Will heat affect the rate of photosynthesis

Background information: Photosynthesis Photosynthesis is the process of autotrophs turning carbon dioxide and water into carbohydrates and oxygen, using light energy from sunlight.

Photosynthesis Lab Walkthrough — bozemanscience

Variables: The variables that might affect the rate of photosynthesis in this experiment are: Temperature: When the temperature rises so does the rate of photosynthesis; this is because as the temperature around the plant rises the enzymes controlling photosynthesis inside the chloroplasts heat up and start moving around faster, the fast moving molecules collide with other fast moving enzymes causing them to react....

LabBench Activity Plant Pigments and Photosynthesis

The process of chromatography, which separates complex mixtures into their component parts based on their solubility in different kinds of solvents, can help identify some of the pigments used in photosynthesis.

Remove several leaves from around the cut end of the stem

Red (610 - 700 nm) and blue (450 - 500 nm) wavelengths are most effective in promoting photosynthesis. Green (500 - 570 nm) light is least effective - it is not absorbed by plants but is reflected which is why green plants appear to be green. The conclusion: different wavelengths of light affect the photosynthetic process. Red and blue light support the highest rates of photosynthesis (although white light causes the most disks to float, remember that white is all wavelengths so it can be expected to result in the highest percentage).

lab 4 AP sample 2 - Biology Junction

Furthermore, I predict that if the light intensity increases, the rate of photosynthesis will increase at a proportional rate and more oxygen will be produced and therefore the oxygen levels will increase.

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