Across
- 2. to skim over water
- 4. a gas that can combine with oxygen to make water molecules
- 7. mathematics that focuses on angles, lines, surfaces, and solids
- 8. a small rock that is lined with crystals and other minerals
Down
- 1. lacking water or moisture
- 2. an above-ground pipe that draws water from a main service pipe underground, used in fighting fires
- 3. the study of earth’s physical features, atmosphere, and human activity
- 4. to use with water
- 5. a person who studies geology
- 6. the study of earth’s physical history and processes