Matter is made of particles too small to be seen. But if we can’t see these particles, how do we know they exist? In this lesson, students will plan and carry out investigations with air and simple solutions to provide evidence that all types of matter are made of tiny particles that are invisible to the human eye.
This lesson results from a collaboration between the Alabama State Department of Education and ASTA.
An atom is a tiny particle in matter, and atoms are made of protons, neutrons, and electrons. Some matter, like your body or your book, is made of lots of different kinds of atoms, but elements are made up of only one kind of atom.
The classroom resource provides a video that will explain atoms and how they are made of smaller particles called protons, electrons, and neutrons. This resource can provide background information for students before they construct their own models and/or carry out their own investigations. There is also a short test that can be used to assess students' understanding.
The purpose of this lesson is to view salt under varied magnifications so students can begin to construct the understanding that materials may be composed of parts that are too small to be seen without magnification.