Photosynthesis Flashcards
(26 cards)
Carbon dioxide
Comes from the air, diffuses into the leaf via stomata (tiny holes)
Water
Absorbs into the roots
Glucose
Made in the leaves during photosynthesis
Oxygen
Diffuses out into the air through stomata
Waxy cuticle
Protects and stops water loss
Palisade layer
The sunlight hits the top and this is we’re most photosynthesis happens
What do plants do with Glucose
They use it to grow
Cytoplasm
Where chemical reactions occur
Nucleus
Contains DNA that stores information to control the cell
Cell wall
Contains cellulose to give the cell strength and support
Vacuole
Contains cell sap to provide support for the cell
Cell membrane
Controls what goes in and out of the cell
Chloroplasts
Contains chlorophyll to trap light and be the site of photosynthesis
What is photosynthesis
Photosynthesis uses light energy to make glucose that contains energy. Without this the plant can’t grow
Using glucose (5)
Respiration, Lipids, Cellulose, Protein, Starch
So what did we learn from the rate of photosynthesis?
The closer the ligh the more oxygen therefore more photosynthesis but it will slow down if the plant gets TOO MUCH light until it will eventually stop
How do you test for the presence of oxygen
Glowing splints relights
State the 3 factors that affect the rate of photosynthesis
Light intensity, Carbon dioxide concentration, Temperature
Phosphorus
Role: For healthy roots
Symptoms: Poor root growth, Younger leaves are purple
Nitrate
Role: For healthy growth and to make proteins
Symptoms: poor growth, older leaves are yellow
Potassium
Role: For healthy leaves and flowers
Symptoms: Yellow leaves with dead patches
Magnesium
Role: For making chlorophyll
Symptom: Plants turn yellow
What are fertilisers
Chemicals applied to soil to replace minerals taken out of soil
Why do farmers use fertilisers?
As the crops are harvested, they do not die and replace minerals taken from the soil, so fertilisers are used to prevent future crops suffering from mineral loss.
