Explain which is the largest reef?

796

---

Explain how do minerals become rocks and rocks become soil?

820

---

Define loam soil?

855

---

Explain the earths core made of?

789

---

Explain what makes mountains appear purple?

736

---

Explain which carbonate mineral reacts readily with cool dilute hydrochloric acid to produce visible bubbles of carbon dioxide gas?

804

---

Explain how has the earth changed since it was formed?

811

---

Explain what does a geologist do on a typical day?

782

---

Explain the name of the largest volcano in the world?

784

---

Explain the earths crust made of?

754

---

Explain how are the layers of schist separated into alternating light and dark minerals?

823

---

Define granite?

789

---

Describe the formation of sedimentary rocks?

777

---

Explain why does a glacier move?

768

---

Describe the formation of metamorphic rocks?

829

---