There are 3 states of matter: solids, liquids, and gases.
For matter to change states, you must involve energy.
Matter is what scientists call the stuff that surrounds us.
When the salt was added to the water, it didn’t disappear, it became a solution.
A physical change is when something changes from on state of matter into another, when materials change form: water changing from liquid to solid (ice cubes), water changing to a gas (evaportation).
Water boiling, water freezing, a burning match are all examples of physical changes.
In this weeks project we changed the solid dry salt into a liquid solution (by adding water), and evaporation caused the water to turn into a gas.
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