The sun can be seen only in the daytime, but the moon can be seen sometimes at night and sometimes during the day. The sun, moon, and stars all appear to move slowly across the sky. The moon looks a little different every day, but looks the same again about every four weeks.
Water can be a liquid or a solid and can go back and forth from one form to the other.
If water is turned into ice and then the ice is allowed to melt, the amount of water is the same as it was before freezing. Water left in an open container disappears, but water in a closed container does not disappear. Over an extended period of time, kindergarten students observe trees in their school yard. Students extend their understanding of trees as a growing, changing, living part of their world. During each season, the school yard trees are revisited and their twigs, leaves, flowers, and seeds are observed and compared to those from a previous season.