The first video to the left explains the cork challenge and penny challenge. Watch the video while completing the following assignment. Then watch the next two videos on the left about surface tension and water striders (click HERE if it says video unavailable).
The following is a TEST. Make sure you have completed the above assignments before attempting the test. Review the videos if you need before attempting the test.
The following is a TEST. Make sure you have completed the above assignments before attempting the test. Review the videos if you need before attempting the test.