here's my problem.. CHEMISTRY: You know very well that when a liquid is cooled, its molecules move slower and thus it solidifies. Most solids have higher density than water so they tend to sink in water. One hot day, you put two ice cubes on your soda and you noticed that the cubes floated. Why didn’t the solid cubes sink? ASTRONOMY: Going home late from school, you noticed that the crescent moon still has a dark portion which shows the outline of a full moon. You have learned from class that the illumination and phase of the Moon are determined by the relevant positions of the Sun, Earth, and Moon. What is the phenomenon that makes you see the outline of the Moon at the start of the Crescent phase and how does it happen? help?