A recent science unit of study explored the question, "Is it a solid, a liquid, or a gas?" The students learned about these three states of matter and did a great job sorting different items -- air in a balloon, water, juice, or a pencil for example -- into the correct category. We also did some super fun experiments to illustrate how temperature can affect an item's state.
The easiest way to show this is to freeze water. Ice is a solid because it has its own shape, while water is a liquid because it takes the shape of its container. What better way to demonstrate this by making kool-aid popsicles!
Mrs. Viall was out the day we ate our solid concoctions, so there aren't any photos, but trust me, the kids all reported they were delicious!
We also changed crayons from a solid to a liquid, and then back to a solid. We filled silicone snowflake molds with peeled crayon pieces, and then heated the molds up in the microwave. We observed the crayons turning to liquid as they heated up, and then saw them turn back into a solid as they cooled. But now we had swirly snowflake crayons instead! Each student chose one to take home, and we have several here at school in our classroom.