The role of a catalyst in a chemical reaction is to a: be non-specific enough to work in any reaction. b: lower the activation energy and speed up the reaction. c: increase the amount of energy required for the reaction to occur d: enter into the reactants to change the product.

The condition in which joints are inflamed is bursitis select the best answer from the choices provided ot f

2points what is the term for a female reproductive cell? a. egg b. chromatid c. allele d. fertilization

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 !