A student plugs a hot plate into an outlet and turns on the hot plate. The student places a
beaker with ice on the hot plate to melt the ice.
Which of these objects
uses the same source of
energy as the hot plate?
A Toaster using electrical energy
B Balance using mechanical energy
C Plant using light energy
D Solar calculator using solar energy

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 !