Which of the following scenarios represents the best use of a scientific model?
a. predicting weather patterns
b. studying the result of mixing two chemicals
c. studying the effect of oil spills on plant growth
d. studying the speed of a ball down an inclined plane

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 !

The arrows in the illustration point to

How many chromosomes are in a human gamete?