Sandra is a 21-year-old college student who is unsure how her current relationship will be affected if she chooses to wait until marriage to be sexually active. A psychology researcher would tell her:couples who wait until they are deeply committed have the best sex lives.

Why are scientists concerned about the depletion of the ozone levels in the stratosphere?

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 !

Will give ! ! widentify the advantages and disadvantages of renewable and nonrenewable energy resources.