Write Up Flashcards
systematic errors
- uneven light distribution between the plants so some plants are getting more light than another
random errors
- different eye levels to view measurements every time
- everyone not using the exact same amount of bicab soda
where does carbon dioxide enter the plant?
- enters through the small pores on the leaves of the plants called Stomata
- guards cells open and close the Stomata
Xylem
transports water from roots to leaves
mesophyll
contains a large amount of chloroplasts (where photosynthesis occurs)
Phloem
transports food from the leaves to the rest of the plant
independent variable
what you are changing.
amount of light exposed to plant
hypothesis
if the amount of light exposed to a plant is increased then the amount of oxygen produced will increase
dependant variable
what you are measuring
amount of oxygen produced
controlled variables
- the size of the beaker
- a type of pond plant
- amount of water
- brand of foil
In an aquatic environment, what would happen to the carbon dioxide if all the plants died?
- no living things to take in CO2 from the water through photosynthesis
-as a result plants and everything in the aquatic environment would die
how could you improve the experiment?
- use measuring cylinders instead of test tubes to make results more accurate
- conduct multiple trials to make it more accurate
- measure the exact amount of bicarb soda, not eye-ball
why do living things need photosynthesis
- nearly all living things depend on it for food
- produces oxygen for humans to breathe
photosynthesis equation
carbon dioxide + water = glucose + oxygen
- sun is an reactant
aim
to explore how to amount of light exposed to a plant affects the process of photosynthesis
