The Rate Of Photosynthesis Flashcards
How does light slow down the rate of photosynthesis
Light provides the energy for photosynthesis
As the light level is increased, the rate of photosynthesis increases steadily but only up to a certain point
Beyond that, the rate will no longer increase because either the temp of co2 level will be a limiting factor
How does too little carbon dioxide slow down the rate
Co2 one of raw materials needed for photosynthesis
Amount of co2 will only increase the rate to a certain point hence co2 is no longer the limiting factor, temp is
What does the temperature have to be like
Limiting factor of temp because it’s too low - enzymes needed for photosynthesis work more slowly at low temperature
If too hot - enzymes needed for photosynthesis will be damaged (45 degrees)
How does a graph show the limiting factors of light intensity and temperature
At the start, the rate increases steadily as light intensity increases
But lines level off when light is no longer the limiting factor
The line that levels off at a higher point shows that temperature must of been the limiting factor
How does a graph show the limiting factors of light intensity and co2 concentration
Both lines level off when light is no longer the limiting factor
Both lines level off when light is no longer the limiting factor
The line at a higher point means that co2 concentration was a limiting factor
What is the inverse square law
1/d(squared)
What is distance and light intensity to each other
Inversely proportional
What is the most common way to artificially create the ideal environment for plants to grow
Greenhouse
How to greenhouses maintain the temperature so it doesn’t become limiting
Trap sun’s heat
Winter - gardener might use a heater to keep the temperature at the ideal level
Summer- might use ventilation or shades to cool
What do farmers supply the plants at night with to give their plants more quality photosynthesis time
Artificial light
How can farmers increase the leaves of carbon dioxide in the greenhouse
By using a paraffin heater to heat, as it burns it makes carbon dioxide as a by product
What is a good thing about keeping plants enclosed in a greenhouse
Free from pests and disease
By suppling the right amount of light, temperature and co2, what can happen
The plants will grow faster and it can be harvested often which can be sold
What the unit for light intensity with the inverse square law
A.u
