My S.T.E.M. 2013-2014

QuestionWhich type of tree will have the most relief from the sun?

Purpose• The purpose of my investigation is to

determine what type of trees will provide the most relief from the sun. This is important because I want to know what tree to stand under on a hot day to stay cooler.

HypothesisI hypothesize that an oak tree will provide the most relief from the sun. I believe this because oak trees have more branches.

PROCEDURE

Materials*One thermometer

*5 different types of trees

VariablesManipulated: Type of tree Responding: Temperature Constant:

- Thermometer- The time the day to record- Time standing under the tree and sun

Directions1 Gather materials2 Stand under direct sun for two minutes with thermometer. After two minutes , record the temperature. 3 Stand under an oak tree for two minutes with thermometer. After minutes record temperature 4 Repeat steps 2-3 with a lugustrum tree5 Repeat steps 2-3 with a golden rain tree6 Repeat steps 2-3 with a queen palm tree

Directions 7 Repeat steps 2-3 with a pine tree8 Repeat steps 2- 7 for 4 more trials9 Calculate the average difference between temperature in direct sun and under tree each type of tree.

DIFFERENCE IN TEMPERATURE - DEGREES CELSIUS

TRIAL 1 TRIAL 2 TRIAL 3 TRIAL 4 TRIAL 5 AVERAGE

Temperature in Sun 61 63 41 60 71 59.2

TYPE OF TREE

Lugustrum 15 17 8 13 25 15.6

Golden Rain 17 19 17 14 31 19.5

Queen Palm 16 17 8 13 22 12.8

Oak 16 19 13 13 25 17.2

Pine 16 19 16 21 34 21.2

Conclusion

My hypothesis was incorrect. The oak tree did NOT provide the most relief from the sun. The queen palm had the most relief at 12.8 degrees, the lugustrum at 15.6 degrees, the oak tree at 17.2 degrees, the golden rain at 19.5, and the pine tree at 21.2 degrees. If I had to do this again, I want to control the placement of the trees. I wonder if it would be warmer with a person under it?