Q: What are the two most common silicates?   A:
OPTIONS:
- Analcime and Feldspar
- Petalite and Quartz
- Petalite and Analcime
- feldspar and quartz

Answer: feldspar and quartz


Q: The tyndall effect refers to the scattering of what by colloidal particles?   A:
OPTIONS:
- primary colors
- dark matter
- dust mites
- visible light

Answer: visible light


Q: What kinds of rocks can change and become new types of rocks?   A:
OPTIONS:
- igneous rocks
- metamorphic rocks
- sedimentary rocks
- any types of rocks

Answer:
any types of rocks