Walk In… Take out notebook At the back of notebook, write today’s date, and copy the question and answer in sentences: What are some of the things you should always include when making a graph?

Possible Answers Title Axis labels Correct data Key Neatness Color

Tennis Ball Drop

Tennis Ball Drop Purpose: How will changing the height a ball is dropped from change how high it bounces? In today’s lab, you will be given a tennis ball and meter stick. You will drop the ball onto a table from different heights and record how high the ball bounces. You will do three trials for each drop height and also collect the average bounce heights.

Hypothesis Hypothesis: If a ball is dropped from higher heights, then _______ because ______.

Variables Independent Variable (what we change): Dependent Variable (what we measure):

Height ball was dropped from (cm) Height ball bounced (cm) Trial 1 Trial 2 Height ball bounced (cm) Trial 3 Average height of bounce   10 20 30 40 50 60 70 80 90 100

Draw a graph to show the height of the bounces.

Was your hypothesis supported? Reflections and Questions – Answer in your notebook in complete sentences. How does the height of the ball being dropped affect the height of the bounce? Was your hypothesis supported? Give an example of a qualitative observation you made in this lab. Give an example of a quantitative observation you made in this lab.