Across
- 3. Anything that takes up space and can be weighed.
- 5. Energy that comes from a source and travels through space at the speed of light.
- 8. One of the very small parts of matter (as a molecule, atom, or electron).
- 9. An action or process of solving a problem.
- 10. A way in which heat travels.
Down
- 1. Substances that are made up only one kind of particle and have a fixed or constant structure.
- 2. When heat moves from one object to another through direct touch.
- 3. The point at which materials change from a solid to a liquid.
- 4. An idea or boilingpoint The temperature at which any liquid starts to boil.
- 6. set of ideas that are intended to explain facts or events.
- 7. The temperature at which any liquid starts to boil.