Modeling in 3–5 builds on K–2 experiences and progresses to building and revising simple models and using models to represent events and design solutions.
Use models to describe phenomena.
DCI: PS1.A: Structure and Properties of Matter
Matter of any type can be subdivided into particles that are too small to see, but even then the matter still exists and can be detected by other means. A model showing that gases are made from matter particles that are too small to see and are moving freely around in space can explain many observations, including the inflation and shape of a balloon and the effects of air on larger particles or objects.
CCC Scale, Proportion, and Quantity
Natural objects exist from the very small to the immensely large.