Explain which is the largest reef?

734

---

Explain how do minerals become rocks and rocks become soil?

752

---

Define loam soil?

784

---

Explain the earths core made of?

709

---

Explain what makes mountains appear purple?

686

---

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

748

---

Explain how has the earth changed since it was formed?

744

---

Explain what does a geologist do on a typical day?

723

---

Explain the name of the largest volcano in the world?

717

---

Explain the earths crust made of?

707

---

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

759

---

Define granite?

726

---

Describe the formation of sedimentary rocks?

712

---

Explain why does a glacier move?

720

---

Describe the formation of metamorphic rocks?

743

---