Matter and Weathering Crossword

3. A gas made of nitrogen and oxygen; often produced by cars and can affect air quality.
6. Negatively charged particles that move around the outside of an atom.
7. Weathering caused by living things, such as plant roots growing into cracks in rocks.
10. A state of matter with no fixed shape or volume.
14. Anything that has mass and takes up space.
15. The movement of rock or soil from one place to another by wind, water, ice, or gravity.
18. (duplicate term included for clarity) A particle made of two or more atoms chemically bonded together.
19. The ability to cause change or do work.
21. The breaking down of rocks by chemical reactions that change the minerals inside them.
23. The center of an atom that contains protons and neutrons.
24. Weathering that happens when water freezes in cracks, expands, and breaks the rock apart.

1. Positively charged particles found in the nucleus of an atom.
2. The process of breaking down rocks into smaller pieces by wind, water, chemicals, or living things.
4. Dioxide A gas made of one carbon atom and two oxygen atoms; often released during breathing and burning.
5. The physical breaking of rock into smaller pieces without changing what it is made of.
8. A molecule made of two oxygen atoms; needed by most living things for breathing.
9. A state of matter that has a fixed volume but takes the shape of its container.
11. A process where substances change into new substances with different properties.
12. The settling or dropping off of sediments after they have been moved by erosion.
13. Particles in the atom’s nucleus that have no charge.
16. A state of matter with a fixed shape and volume.
17. A molecule made of two hydrogen atoms and one oxygen atom; essential for life.
20. A gas made of one carbon atom and four hydrogen atoms; a greenhouse gas found in natural gas.
22. Two or more atoms joined together.
25. The smallest building blocks of matter.