Across
- 2. - The force that particles exert when they collide with each other or with container walls.
- 4. - The substance that makes up everything around us; it has mass and takes up space.
- 8. - A representation to explain how particles behave in different states of matter.
- 9. - A small piece that makes up matter; part of the particle model.
- 11. - A characteristic of matter used to describe and identify it, like color, texture, or state.
- 12. - The process where gas turns into a liquid.
- 14. - The change from solid to liquid.
- 16. - To squeeze particles closer together, as in gases.
- 17. - A state of matter with a definite shape and volume.
- 18. Units - International System of Units used to measure properties such as mass (kilogram), length (meter), and temperature (Kelvin).
- 19. - When particles spread out, often when heated.
- 21. - The measure of how closely packed particles are in a substance.
Down
- 1. - The change from liquid to solid.
- 3. - A distinct form of matter, such as solid, liquid, or gas.
- 5. - A measure of how hot or cold something is, affecting particle movement.
- 6. - The amount of space an object or substance takes up.
- 7. - A property describing how much a substance can be squeezed; high in gases, low in solids.
- 10. - Characteristics used to describe matter, like shape, size, and state.
- 13. - A state of matter that takes the shape of its container but has a definite volume.
- 14. - The amount of matter in an object.
- 15. - A state of matter that spreads to fill the shape and volume of its container.
- 20. - The smallest unit of matter.
- 22. - The process where liquid turns into gas.