Photosynthesis (EOY Second form) Flashcards
(19 cards)
What is the word equation for photosynthesis
Carbon dioxide + water —-> glucose + oxygen.
What are the reactants in photosynthesis
Carbon dioxide + water
What are the products in photosynthesis
Glucose + oxygen
What four things are needed for photosynthesis
Carbon dioxide, water, sunlight and chlorophyll
What is chlorophyll
A green chemical found in chloroplasts
Where do chloroplasts appear
Mainly on the top of the leaf
Why do plants increase in weight
Due to photosynthesis which takes energy from the sun to turn carbon dioxide and water and glucose and oxygen.
Where is energy transferred from to allow the chemical reaction to occur
The sun
What is the name of the green pigment in plants that allows them to undergo photosynthesis
Chlorophyll
Which gas is produced by photosynthesis
Oxygen
What two environmental factors can slow down the growth of a plant even when it has plenty of water
Lack of sunlight and lack of carbon dioxide
Why will a brown leaf not photosynthesis
Because it doesn’t have any chlorophyll
What is the chemical used to test for starch
Iodine
What colour will iodine become in starch
From an orange colour to a blueish black
What is glucose stored as in plants
Starch
What is starch
Lots of glucose molecules joined together / how glucose is stored
Why is glucose stored as starch
As starch is insoluble
Where is starch stored in the plant
Leaves, stems, roots
What does the plant do when it needs energy
Converts the starch back into glucose
