The process of boiling is considered to be a * A) chemical change, because a new substance is formed
B) chemical change, because a new substance is not formed
C) physical change, because a new substance is formed
D) physical change, because a new substance is not formed

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 !

Give examples of selective advantage of organism’s body part/organ

Chloroplasts and bacteria are in size. a. similar b. at different ends of the size range c. exactly the same d. none of these