Titl Fun in the Sun: The Effects of Sunlight on Dandelion Size
Apparent in the class results, the average numbers of dandelions are inconsistent and
random. Plots that are relitivily close on the grid have large differences between
dandelion counts in the area. Both sites are near high traffic areas by roads and trails,
moderately covered by trees.
The more sunlight the smaller the leaves are due to the over exposure of heat to the plant
the roots dry out and cannot grow. The less sunlight there is, the larger the plant leaves
are since they can flourish in moist and shady areas unlike other plants. With less sunlight
the leaves are able to get as much nourishment as possible and therefore have a larger
size overall. Therefore the size of dandelions in an area can be due to how much sunlight
Hypothesis: If less sunlight is placed on the dandelions, there will be larger leaf and stem
size, than dandelions in the sunlight.
Prediction: The dandelion placed on the plot with sunlight will grow smaller in leaf size
with soil that will be dry due to the constant heat. Dry soil will stop the roots of the
dandelion from gaining rich nutrients for the growth process. On the other hand in good
wet soil when mixed in with tall grasses, Dandelions can compensate for their situation
by growing much taller flowers and larger leaves. They can do this with great ease when
they are motivated to rise above surrounding vegetation in order to get more light.
Description of Experiment:
In this experiment we will be examining the leaf growth of dandelions in two
separate plots. We will compare leaf growth by planting them in different abiotic
conditions. The dandelions will be placed in different locations, one surrounded by
sunlight and the other placed in the shade. This site should be close and accessible. Also,
this area should not be disturbed by biotic factors, preferably