Across
- 2. A state of matter that has no definite shape or volume. It expands to fill the shape and volume of its container.
- 6. A state of matter similar to gas but with some of its particles electrically charged. It is found in stars and lightning.
- 7. A group of two or more atoms bonded together, representing the smallest unit of a chemical compound that can take part in a chemical reaction.
- 10. The process in which a gas cools and changes into a liquid.
- 12. A model or imitation of a real-world process used to study or explain how something works.
- 13. Anything that has mass and takes up space. It exists in three main states: solid, liquid, and gas.
Down
- 1. The process in which a solid changes directly into a gas without passing through the liquid state.
- 3. The smallest unit of an element that maintains the properties of that element. It is the basic building block of matter.
- 4. The transformation of a substance from one state of matter (solid, liquid, gas) to another.
- 5. A state of matter that has a definite volume but no fixed shape. It takes the shape of the container it is in.
- 6. A tangible, 3D representation of an object or system used to study or demonstrate its properties.
- 8. The process in which a liquid changes into a gas, usually when heated.
- 9. The process in which a gas changes directly into a solid without passing through the liquid state.
- 11. A state of matter that has a definite shape and volume, with particles closely packed together.