When people don't want to wait for the ketchup to come out, they usually try hitting the bottom of the bottle. This is the wrong approach because shocking the bottle makes the ketchup turn solid. Instead, simply turn the bottle over and stick a knife inside. The knife blade will give the ketchup a surface to flow along. Let it dry to a solid and then put it in the garbage.
Students conduct a simple investigation.
Materials can exist in different states - solid, liquid, and gas. Some common materials can be changed from one state to another. A substance has characteristic properties. Top of Page Managing Time and Students Classroom management is always a critical factor for any successful lesson, and the Dirtmeister's Science Lab is no exception. In this case, all students can make predictions while one or two volunteers can carry out the activity in front of the room.