The atoms and molecules in gases are much more spread out than in solids or liquids. They vibrate and move freely at high speeds. A gas will fill any container, but if the container is not sealed, the gas will escape. Gas can be compressed much more easily than a liquid or solid.
Easy 5 points. Stop, Drop, and Roll. In that order.
Exoskeleton and Segmented Bodies and Jointed Appendages and Bilateral Symmetry and <span>Open Circulatory System</span>