Earth

2. the type of weathering caused by chemical elements
4. solid; rocky; relating to Earth
5. are naturally occurring, solid, inorganic substances.
7. people who study minerals
10. One of the most ancient branches of astronomy, measuring the motion of astronomical beings
12. rocks containing valuable materials
13. a solid mass of geological materials
16. physical and chemical breakdown of a rock
17. The study of the sun, moon, stars, planets, comets, gases, galaxies, dust, and other non-earthly bodies & phenonema
19. a chemical element with the symbol Au, making it one of the higher atomic number elements that occur naturally.
20. Huge celestial bodies made up of mostly hydrogen (H) and helium (He)
21. a granular material composed of finely divided rock and mineral particles.
22. angle bar an iron or a steel structural bar that has an L-shaped cross section.
24. is an alloy of copper and zinc, in proportions which can be varied to achieve varying mechanical and electrical properties.
25. An important figure who impacted astronomy greatly
26. the transport of rock particles, sediments, and soils by water, wind, or glaciers.
28. the type of weathering caused by physical elements
30. the type of weathering caused by biological elements

1. thin aluminum sheeting used especially to cover and wrap food
3. A group of stars that seem to form an image
6. a chemical element with the symbol Cu.
8. The largest & longest of the 88 modern constellations, which its name means 'snake' in Greek
9. a type of rocks formed by physical or chemical changes to an existing rock
11. a type of rock made by accumulation of sediments
14. Scientists who study astronomy involving invisible, and sometimes purely theoretical things
15. the hard fibrous material that forms the main substance
18. A close cousin to astronomy
23. a type of block used to build walls, pavements and other elements in masonry construction.
27. The Greek plural term for 'clouds'
29. a non-crystalline, often transparent amorphous