B8 - Photosynthesis Flashcards
What does photosynthesis use to turn carbon dioxide and water into glucose and oxygen?
Light energy
What does photosynthesis use energy for?
To change carbon dioxide and water into glucose and oxygen
Is the process of photpsynthesis exothermic or endothermic?
Endothermic
Why is the process of photosynthesis endothermic?
Because it absorbs energy from sunlight
Why is the process of photosynthesis endothermic?
Because it absorbs energy from sunlight
What is the word equation for photosynthesis?
Carbon dioxide + water ——–» glucose + oxygen
What is the symbol equation for photosynthesis?
6CO2 + 6H20 ———> C6H12O6 + 6O2
What are the 5 main ways plants use glucose?
For respiration
Making cellulose
Making animo acids
Storing as fats and oils
Stored as starch
Why do plants convert glucose into cellulose?
To make the plant cell wall strong
How do plants make animo acids using glucose?
The glucose is combined wirh nitrate ions that are absorbed from the soil
Where can starch be stored in a plant?
The roots, stems or leaves
Why is glucose turned into starch for storage?
For environments where the plant cant photosynthesise - like winter
Why does the plant use starch for storage instead of just using glucose?
Starch is insoluble, so osmosis cant affect the plants water balance
What are 4 limiting factors that effect the rate of photosynthesis?
Light intensity
CO2 concentration
Temperature
Amount of chlorophyll
What does a limiting factor mean?
Any factor that stops photosynthesis from happening faster
Name a scenerio where light intensity would be a limiting factor for photosynthesis
Night time
Name a scenerio where temperature would be a limiting factor for photosynthesis
Winter time
How can the amount of chlorophyll be affected in a plant?
If the plant has:
A disease
Or a lack of nutrients
What is the inverse square law equation that links light intensity and distance
Light intensity (is directly proportioal to symbol) 1/ distance(squared
What is the most common way to artificially create the ideal environment for plants to grow?
Growing them in a greenhouse
Why are greenhouses a great environment for growing plants?
They help trap the suns heat and make sure the temperature doesnt become a limiting factor
Except from tobacco mosaic virus, how else would a plant have a low production in chlorophyll?
If it has a magnesium deficiency
