This is an important concept to understand, and it is seen in many things we use every day. A good example is the Egg States video, showing how a mixture of liquid and gas can seem to be a solid.
Before you try to decide if something is solid, liquid, gas, plasma, or some other state of matter, first make sure that it is a pure substance, and not a mixture of different states.
Click to see which state standards this question tests, and which of my videos, experiments, and other resources support that topic.
SC.2.P.8.2 Identify objects and materials as solid, liquid, or gas.
SC.5.P.8.1 Compare and contrast the basic properties of solids, liquids, and gases, such as mass, volume, color, texture, and temperature.
|A Bouncing Water Balloon||video|
|Experimenting with Dry Ice||video, free|
|Wax and Wood, part 1||video|
|Wax and Wood, part 2||video|
|Ice Cream Science||video|
|Raw Egg or Boiled?||video|
|Air has Weight||text page|
|Teach It Right the First Time.||text page, free|
SC.8.P.8.1 Explore the scientific theory of atoms (also known as atomic theory) by using models to explain the motion of particles in solids, liquids, and gases.
UT.5.I.2.a Identify the physical properties of matter (e.g., hard, soft, solid, liquid, gas).