Directions: 1. Put the tack on a table, and hold the point of the nail over it.

2. Then slowly move your magnet toward the other end of the nail.
Answer the following questions.

a. Does the magnet have to be touching the nail to lift the tack or paper clip?

b. How close does it have to be? Experiment with different sized magnets.

c. Does the size of the magnetic field change with the size of the magnet?

Diego conducted an experiment to find out what kind of ball bounces the highest when dropped from a five-foot platform. he used a golf ball, a tennis ball, and a soccer ball. he dropped each ball from the balcony once. diego recorded his observations after each drop. what can diego do to best improve the reliability of his results? a) drop each ball from the platform three more times b) record his observations in more than one unit c) write at least two scientific questions after the experiment is complete d) share his results with other people who have done similar experiments you for the !