Why do leaf disks sink in the dark?
Why do leaf disks sink in the dark?
When you put floating leaf disks in the dark, they will eventually sink. Without light energy, no photosynthesis will occur, so no more O2 gas will be produced. However, respiration continues in the dark, so the disks will use the accumulated O2 gas.
How does leaf color affect the rate of photosynthesis?
The color or wavelength of light does affect photosynthesis, which is how plants can basically create their own food. Essentially, the reason why plants are green is they are absorbing the other wavelengths of light but reflecting back the green. The wikipedia page on photosynthesis goes into a lot more detail.
How does color affect photosynthesis?
The lights higher on the light spectrum, like blue, would have the fastest rate of photosynthesis because the energy is the highest. The green light would have the slowest rate because the chlorophyll inside of the leaves reflects green light, so it would not be absorbed as much as the other colors.
How does the color of light affect the rate of photosynthesis in spinach leaves?
If spinach leaves are placed under red, blue, and white light, the plants will have the highest rate of photosynthesis under the red light. This is due to the fact that red light has the longest wavelength of all visible light, allowing it to radiate more energy to the plant.
What is the effect of darkness on photosynthesis?
Photosynthesis stops when the sun sets. During night hours, most plants switch from photosynthesis to the opposite process, respiration, in which carbon dioxide and water are produced rather than consumed.
Which kind of light will cause the leaf disks to rise the fastest?
The green light would have the slowest rate because the chlorophyll inside of the leaves reflects green light, so it would not be absorbed as much as the other colors. Prediction: The blue light will have faster-floating leaf disks than the red, yellow, and green lights.
How do plants with Coloured leaves photosynthesize?
Other plants, like a red-leafed tree, have plenty of chlorophyll, but the molecule is masked by another pigment. Chlorophyll absorbs red and blue light, “reflecting, and thus appearing, green,” Dr. Pell said. Chlorophyll uses this electromagnetic energy, along with carbon dioxide and water, to make glucose and oxygen.
Why the Colour of leaf is green?
So, plants and their leaves look green because the “special pair” of chlorophyll molecules uses the red end of the visible light spectrum to power reactions inside each cell. The unused green light is reflected from the leaf and we see that light.
What color of leaf would absorb more light?
green
Chlorophyll absorbs light most strongly in the blue portion of the electromagnetic spectrum, followed by the red portion. Conversely, it is a poor absorber of green and near-green portions of the spectrum, hence the green color of chlorophyll-containing tissues.
What color light is best for photosynthesis and why?
To perform photosynthesis, violet light is the most important color, and it’s from these wavelengths that plants get most of their energy. The reason for this is because out of the visible spectrum, red light is the longest wavelength light that the photosynthesis process can use, but it has the least energy.
Why do plants absorb red and blue light?
Generally you can say that plants absorb primarily red (or red/orange) and blue light. It’s within the chloroplasts that all this light absorbing happens. The chloroplasts take the energy harnessed in these light rays and use it to make sugars for the plant to use in building more plant material = photosynthesis.
What frequency of light is needed to change the leaf discs?
My hypothesis is that if a light source of 100 watts above the plant discs is changed to the different frequencies of Red Light (430–480 THz), Blue Light (610–670 THz), Yellow Light (510–540 THz), Green Light (540–580THz), and Clear Light, the number of leaf discs out of 12 floating in the bicarbonate solution over time will differ.
What happens when you put floating leaf disks in the dark?
When you put floating leaf disks in the dark, they will eventually sink. Without light energy, no photosynthesis will occur, so no more O 2 gas will be produced. However, respiration continues in the dark, so the disks will use the accumulated O 2 gas. They will also produce CO 2 gas during respiration,…
How do you know when Leaf Disks are ready to use?
Turn on the light, start a timer, and watch the leaf disks at the bottom of the cup. Notice any tiny bubbles forming around the edges and bottoms of the disks. After several minutes, the disks should begin floating to the top of the solution.
How does the length of time affect the plant disc reaction?
Conducting the experiment for a longer time may cause more or different reactions in the plant discs. If some plant discs get light for a larger amount of time than others the extent of the reaction that occurs may differ. Size of the plant discs cut out.
