Ace the CSET Subtest 2 Math & Science 2026 – Unleash Your Knowledge Power!

In solids, particles are tightly packed and vibrate in place, forming a rigid structure that remembers its shape and maintains a constant volume. Because the particles don’t flow past one another, the overall form doesn’t change and the amount of space the matter occupies stays the same. In liquids, particles can flow past each other, so they keep a fixed volume but adopt the shape of their container. Gases have particles far apart that move freely, so they expand to fill both the space and the container, giving neither a fixed shape nor a fixed volume. Plasma is a highly energized, ionized state that behaves like a hot gas in many ways and generally lacks a fixed shape or volume under ordinary conditions. Therefore, the state with both definite shape and definite volume is solid.