P7,8

Using information from Figs. 3 and 4, explain whether the hypotheses are supported and how the experiment could be improved.                                                                           [5]

·        Hypothesis is supported as wind is mostly southwest. ·        The second hypothesis is not supported, as the presence of wind does not always lead to a decrease in temperature.                                            (Max2@1 mark) ·        Data could be collected over longer hours to provide more data points. ·        Data could be collected at more sites to provide data points. ·        Data could be collected over the entire June to provide allow data averaging. ·        Reading of temperature could be done by one student to prevent parallax errors.                                                                                                  Max3@1 mark

Construct a wind rose that shows the wind direction from 0900 to 1400 at the basketball court.                                                                                                                                [2]

Name the instrument that the students could have used to identify wind direction and describe how to use the instrument.                                                                                [3]

·        Wind vane ·        Place the wind vane in an area or manner such that the wind vane is not obstructed. ·        Record the direction of the wind as where the wind vane points to.

Using graph paper, plot a line graph each to show the temperature of the open field and basketball court and explain the usefulness of using line graphs to present data.          [3]

Award 1mk each for each correctly plotted line graph. Usefulness: Shows trends over time. Allow for easy comparison of multiple sets of data. May be used to estimate future patterns. Max1@1 mark