What is shale?

805

---

What is the earths core made of?

800

---

What is the earths crust made of?

857

---

What is granite?

825

---

How were sedimentary rocks created?

855

---

What is the earth made of?

902

---

What is the difference between a canyon, gorge, and valley?

825

---

What does a geologist do on a typical day?

1025

---

What is the name of the largest volcano in the world?

871

---

What is the difference between the geoid and the surface of the earth?

834

---

Soils take how many years to form?

949

---

What is the difference between a semi-precious and a precious stone?

822

---

What are examples of techno fossils?

1074

---

Discuss major factors that influence mass movements?

790

---

What did radon detection in arid areas can help to explore?

783

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