Question 7
Scientists study changes in beaches, marshes, and other coastal areas. The
movement of water causes these coastal areas to change. Which of these is NOT a
source of data scientists might use to study these changes?
information about the size and shape of beaches
data on waves and tides
maps of hurricane paths in the past ten years
surveys that ask people their opinions of beaches

The diagram below shows the different phase transitions that occur in matter. which arrow represents the transition in which dew is formed?

Which samples do the atoms have the least kinetic energy

An unknown substance is a white solid at room temperature and has a melting point of 78 °c. which of the following substances is most likely to be the identity of the unknown sample? a. naphthalene, a molecular solid with the formula c10h8 b. silica, a network solid held together by covalent bonds with the formula sio2 c. calcium chloride, an ionic compound with the formula cacl2 d. water, an molecular compound with the formula h2o