Photosynthesis Flashcards
(29 cards)
What does chlorophyll do
Absorbs the light energy
What does carbon dioxide do
Diffuses into the leaves from the air
What does water do
Absorbed by the roots from the soil
Oxygen
Some is used in respiration the rest diffuses from the leaves into the air
Glucose
Some is used in respiration the rest is stored as starch or used for making other substances. This is an endothermic reaction
How to de starch a plant
Leave in a dark Cupboard for 24-48 hours.
Starch is used for respiration
Why is it important to turn off the Bunsen burner when you were heating ethanol
Ethanol is highly flammable
Why is it important to remove the chlorophyll before testing for starch 
So we can see the colour change
What colour will the iodine turn to if starch is present
Blue/black
What could you do to check the plant been de starched
Test for starch
Independent variable
Whether it has light or not
Dependent variable
Where there is starch
Control variables
The same plant
What part of the leaf is blue black
Where there is starch, the green part
Why are there some parts of the leaf that do not contain starch
There is no chlorophyll so they can’t photosynthesise
If there is no carbon dioxide will the leaf contain starch
No
Why will the leaf not contain starch if there is no carbon dioxide
The soda lime gets rid of the carbon dioxide
When does respiration take place
All the time
When does photosynthesis take place
In the light
What 2 metabolic processes do plants carry out
Respiration and photosynthesis
Which process requires oxygen
Respiration
What process produces oxygen
Photosynthesis
Photosynthesis word equation
Carbon dioxide + water ——> glucose + oxygen
Respiration word equation
Glucose + oxygen —-> carbon dioxide + water
