Why does a balloon get smaller in cold air? A. the cold air makes the particles move faster
B. the cold air makes the particles slow down
C. the cold air makes the mass smaller
D. the cold air makes the pressure greater

Jewelweed, a flowering plant, has seed pods that burst open when touched and forcefully eject their seeds. these structures are favorable because they a. can cause genetic changes to occur. b. prevent germination within the seed pod. c. aid in the dispersal of the species. d. attract insects that aid in pollination.

Which diagram represents the phase tha occurs after a solid melts?

What is the percent by mass of magnesium sulfate in mgso4.7h2o