A hot sun warms the surface of a lake on a calm day. What will happen to the cold water at the bottom of the lake? A: The cold water at the bottom will rise up and mix with the warm water at the top.
B: The warm water at the top will sink down and mix with the cold water at the bottom.
C: The cold water will remain at the bottom and won't mix very much with the warm water at the top.
D: Both A and B are true.

Which element in the third period would you expect to have the larger atomic radius, sodium (na) or sulfur (s)? a. sodium, because it has a higher effective nuclear charge attracting electrons in fewer energy levels. b. sodium, because it has fewer protons attracting electrons in the same energy levels. c. sulfur, because it has more protons attracting electrons in more energy levels. d. sulfur, because it has a higher effective nuclear charge attracting electrons in the same energy levels.

Alarge marble is dropped in a graduated cylinder with 35ml of water in it. the water level increases to 49ml. what is the volume of the marble

Use the table to identify the phase and phase changes of the elements under the given conditions. write the name of the substance, phase, or phase change