Substances can exist in three states of matter - solid, liquid and gas. Substances can change states. To change the state of a substance energy must be transferred to, or from, the substance.

Does this make you change your opinion about whether it is a solid ... It’s not always so easy to say definitely that a substance is a solid, liquid, or gas. Shaving cream seems to have an unusual ...

Students are introduced to the idea that matter is composed of atoms and molecules that are attracted to each other and in constant motion. Students explore the attractions and motion of atoms and ...

Then you will watch a video showing ice melting from a solid to a liquid and boiling from ... Observe the temperature at each phase change. Students: You will receive a foldable from your teacher.