First, let’s recover what we learned last week about solids, liquids, and gasses.
Solid: firm and stable in shape
Liquid: a substance that flows freely but is of constant volume, having a consistency like that of water or oil
Gas: an airlike fluid substance which expands freely to fill any space available
All matter is composed of tiny particles called gases.
Today we are going to work on a model that explains what we just said about gas.
A model is “a three-dimensional representation of a person or thing”.
To create a model that explains how gases work, we will compare SALT WATER to gas.
Salt and water mix to create salt water, but the individual particles of the salt do not go away, they are merely too small for you to see. This is the same as how we have tiny particles of air that we cannot see but are still there. How can we tell that the salt is there?
You will need to TASTE the salt water and record your observations. Does it taste salty?
You will need to LOOK at the salt water and record your observations. Does it look salty?
You will need to FEEL the salt water and record your observations. Does it feel salty?
Record these three observations on a piece of paper and turn it in by Friday.