Where would you expect to find the oldest basalt on the floor of the atlantic ocean?

859

---

What is the mantle made of?

815

---

Describe the formation of igneous, sedimentary, and metamorphic rocks?

900

---

What is happening when a metamorphic rock is forming?

792

---

What is the general statement regarding the temperature of water in oceanic depths?

804

---

Why did the continents spread apart?

817

---

Contrast the process that forms igneous rocks with the process that form metamorphic rocks?

829

---

Why does a glacier move?

840

---

What is the minimum depth needed for a feature to be considered a canyon?

778

---

Which is the largest reef?

829

---

When does an atoll start to form?

953

---

Where are mountains of the moon?

812

---

What minerals attract lightning?

835

---

What is a hypothesis?

865

---

What layer of the earth does magma form?

858

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