pondweed photosynthesis experiment hypothesis

Factors affecting the rate of photosynthesis; Experiments to investigate photosynthesis; ... Practical - effect of light intensity on photosynthesis in pondweed. Greg Foot explains the effect of ...

Ensure the pondweed is submerged in sodium hydrogen carbonate solution (1%) - this ensures the pondweed has a controlled supply of carbon dioxide (a reactant in photosynthesis) Cut the stem of the pondweed cleanly just before placing into the boiling tube; Measure the volume of gas collected in the gas-syringe in a set period of time (eg. 5 ...

Hi everyone,I hope this video helped you to feel more confident with describing how to investigate rate of photosynthesis.Miss Wetton☕ Buy me a coffee: https...

a Set up the apparatus as shown in a darkened room.. b Look for a stream of bubbles coming from the cut end of the pondweed.. c Count the number of bubbles produced in 1 minute. Repeat twice and calculate a mean bubble count - number of bubbles per minute. This is the mean rate of bubble production. d Change one factor that may affect the rate of photosynthesis, keeping all other factors the ...

Hypothesis: A scientific hypothesis is a proposed explanation of an observed phenomenon that can be confirmed through testing following the scientific method. ... Effect of temperature & CO 2: Pondweed Photosynthesis Investigation. ... Pondweed is an ideal plant choice for photosynthesis experiments, as its aquatic nature allows for easy ...

Photosynthesis practical - bubbling pondweed. In this practical experiment, the rate of photosynthesis is measured by counting the number of bubbles rising from the cut end of a piece of Cabomba pondweed. Cabomba caroliniana is no longer available to purchase in the UK. Please see the SAPS website for guidance on achieving good results with ...

Use forcepts to place the pondweed in the boiling tube carefully. Make sure that you don't damage the pondweed, or cause the liquid to overflow. Position the boiling tube so that the pondweed is ...

Try out this experiment in Atomic Labs. Go to the Biology lab and try the light intensity and photosynthesis experiment. Leave for five minutes for the pondweed to acclimatise to the new light ...

Step 4: Cut the stem of the pondweed cleanly just before placing into the boiling tube. Step 5: Measure the volume of gas collected in the gas-syringe in a set period of time (eg. 5 minutes) Step 6: Change the independent variable - move the light source closer and repeat step 5. Step 7: Record the results in a table and plot a graph of volume ...

Remove any bubbles by gently running a finger and thumb over the surface of the pondweed under the water. Cover one side of the beaker with aluminium foil so that light can only enter the beaker from the other side. Add half a spatula of sodium hydrogen carbonate to the water and leave for. 5 minutes.

In this virtual photosynthesis lab, students can manipulate the light intensity, light color, and distance from the light source. A plant is shown in a beaker and test tube which bubbles to indicate the rate of photosynthesis. Students can measure the rate over time. There is an included data table for students to type into the simulator, but I ...

https://youtu.be/2_0isgPU4bQA great lab practical for investigating photosynthesis and respiration at GCSE and A-level / post-16. Watch this video to find ou...

This traditional experiment on the rates of photosynthsesis in aquatic plants compares three common species. Although tricky to get right, when it works well, this experiment shows how effective plants can be at photosynthesis. Resources • Powerpoint presentation (see end of pdf) • Teachers' notes to support the presentation (see end of pdf)

Aim: Investigate the effect of light intensity on the rate of photosynthesis using an aquatic organism such as pondweed. You will: measure the volume of oxygen produced by the pondweed as the light intensity changes as the light source is moved. measure and calculate rates of photosynthesis. extract and interpret graphs of photosynthesis rate ...

post-16. Watching gas bubble up from a pondweed as it photosynthesises can be a great demonstration or student practical. When placed closer to a light source, the rate of bubbling will speed up, and as the pondweed is taken further away, the bubbles will slow down again - an instant and visual indicator of the importance of light intensity ...

B4 D) Investigating Photosynthesis. In the previous section, we learnt that the rate of photosynthesis is affected by light intensity, concentration of carbon dioxide and temperature. We can change one of these factors and see what effect it has on the rate of photosynthesis by undertaking an experiment. Before we look at the experiment, let ...

It is fairly easy to show that plants produce oxygen and starch in photosynthesis. At age 14-16 students may have collected the gas given off by pond weed (for example Elodea) ... The experiment was started within 5 minutes of preparing the chloroplasts. The reaction was followed using an EEL colorimeter with a red filter - readings taken ...

Measuring photosynthesis via the production of oxygen. Oxygen can be measured by counting bubbles evolved from pondweed, or by using the Audus apparatus to measure the amount of gas evolved over a period of time. To do this, place Cabomba pondweed in an upside down syringe in a water bath connected to a capillary tube (you can also use Elodea ...

Make sure that you don't damage the pondweed, or cause the liquid to overflow. Position the boiling tube so that the pondweed is 10 cm away from the light source. Allow the boiling tube to stand ...

Step 3: Set up the apparatus in a darkened room. Ensure the pondweed is submerged in sodium hydrogencarbonate solution (1%) - this ensures the pondweed has a controlled supply of carbon dioxide (a reactant in photosynthesis) Step 4: Cut the stem of the pondweed cleanly just before placing into the boiling tube. Step 5:

This investigation looks at how the intensity of light affects the rate of photosynthesis in pondweed. The independent variable here is the distance of the light source from the pondweed. Changing ...

This resource describes the use of Cabomba to investigate the effect of light intensity in photosynthesis. The video demonstrates how best to use this protocol with students in the lab, supported by student sheets with four different investigations, technical notes and full teachers' notes. The bubbles from the pondweed can be counted and the ...

This is an example of a common experiment used to investigate light intensity and the rate of photosynthesis. This should help you understand how to work scientifically. Aim of the experiment