Matter | Whole Class
Students investigate matter by observing and comparing solids, liquids, and gases. Through hands-on demonstrations and guided discussion, they learn that matter has mass and takes up space, and they identify how matter can change form while still remaining matter.
| Term | Definition |
|---|---|
| matter | Anything that has mass and takes up space. |
| mass | The amount of matter in an object. |
| solid | A state of matter with a definite shape and definite volume. |
| liquid | A state of matter that takes the shape of its container and has a definite volume. |
| gas | A state of matter that has no definite shape or volume and spreads out to fill its container. |
| volume | The amount of space something takes up. |
| state of matter | One form that matter can be in, such as solid, liquid, or gas. |
Show a few everyday items (ice cube, water, balloon). Ask: What do these have in common? Record student ideas and guide them toward the idea that all are matter.
Share observations, make predictions, and listen for common features of the objects.
Define matter, mass, and volume. Introduce solid, liquid, and gas with simple examples and quick gestures or drawings. Emphasize that matter can change state.
Repeat key vocabulary, answer questions, and compare examples from their own experience.
Lead a whole-class demonstration with an ice cube in a cup, water in a clear cup, and a balloon representing gas. Ask students to describe shape, texture, movement, and container changes. Model how to use evidence to classify each example.
Discuss observations, sort examples as solid, liquid, or gas, and justify choices using evidence.
Ask students to identify classroom objects or materials and classify them by state. Challenge them to explain why each object fits its category.
Name objects, classify them, and explain reasoning using vocabulary.
Review the definition of matter and the three states. Invite a few students to share one new thing they learned.
Share one idea, one example, or one question they still have.
Restate that matter is anything that has mass and takes up space. Solid, liquid, and gas are three states of matter, and everyday materials can be sorted by their properties. Ask students to leave with one example of each state in mind.