Your little sister, who is constantly hungry, begs you to make macaroni and cheese. As you heat up water on the stove, you think back to science class when you studied the changes in states of matter. Tell your sister what change in state occurs when water boils. Then explain to her why this change happens. (Hint: Think about the movement of the particles.)

Alice added sodium chloride to water and stirred the water for several minutes. alice is most likely trying to demonstrate that ionic compounds a. are hard. b. can dissolve. c. are clear. d. can melt.

Distinguish between a transverse wave and a longitudinal wave.

Imagine you work as a consultant, and your daily job involves listening to the constructive criticism of others. as part of your job, you must listen to opposing viewpoints to make important decisions. in this activity, you are a consulting dam engineer. you must make a decision about four different dams; should they be repaired, taken down, or left alone? you will listen to contrasting opinions about what should be done with the dams before you make the final decision. as the consulting dam engineer, what do you decide to do with this dam? explain your reasoning. by making your decision, did you support the opinions of the mayor and/or the dam safety official? why or why not? (site 1)