Explain which is the largest reef?

795

---

Explain how do minerals become rocks and rocks become soil?

819

---

Define loam soil?

854

---

Explain the earths core made of?

786

---

Explain what makes mountains appear purple?

734

---

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

802

---

Explain how has the earth changed since it was formed?

809

---

Explain what does a geologist do on a typical day?

781

---

Explain the name of the largest volcano in the world?

784

---

Explain the earths crust made of?

753

---

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

821

---

Define granite?

785

---

Describe the formation of sedimentary rocks?

777

---

Explain why does a glacier move?

767

---

Describe the formation of metamorphic rocks?

827

---