B8 Photosynthesis Flashcards
Complete the equation for photosynthesis
carbon dioxide + ___ (+ light) → glucose + ___
carbon dioxide + water (+ light) → glucose + oxygen
What is the purpose of a water bath in experiments?
To keep temperature constant.
What are the three main limiting factors of photosynthesis?
Light intensity
Temperature
Carbon dioxide concentration in air
A student monitors the rate of photosynthesis as he increases the light intensity. Eventually, the rate of photosynthesis no longer increases. Why?
Another factor other than light intensity has become the limiting factor.
A student investigated the effect of light intensity on the rate of photosynthesis. Using a lamp he changed the distance of the lamp from the pondweed. Why did he choose to place the pondweed in a water bath?
To ensure the heat given out by the lamp didn’t also change the temperature of the pond weed.
How do you know when a factor is no longer the limiting factor for photosynthesis?
When you change it there is no further change in the rate of photosynthesis.
The source of energy for (outdoor) green plants is radiation from the ____.
sun
Green plants absorb some of the light energy that reaches them for a process called ____.
photosynthesis
Photosynthesis transfers light energy into ____ energy.
chemical
Photosynthesis uses the gas ____.
carbon dioxide
Photosynthesis produces carbon-containing compounds called _____.
a) carbohydrates
b) minerals
c) salts
d) cheese toasties
a) carbohydrates
Photosynthesis produces the gas ____.
oxygen
Chlorophyll absorbs ___ light.
a) white
b) green
c) red and blue
c) red and blue
Chlorophyll reflects ___ light.
a) white
b) green
c) red and blue
b) green
