Explain gastrulation? What stage follows gastrulation?

1

---

Do mountains exist on moon? How were they formed?

838

---

Name the minerals that attract lightning?

816

---

You want to estimate the evaporation through lakes. How would you do it?

842

---

Explain the process of formation of sedimentary rocks?

820

---

What do you mean by loam soil?

840

---

How old is the earth? How has the earth evolved since formation? How do you calculate the age of earth?

796

---

How is the age of mountains calculated?

944

---

Throw some light on water temperature in oceans and its effect on marine life.

796

---

Explain the constitution of mantle?

815

---

Explain ablation.

809

---

How does a volcano erupt?

836

---

Explain techno-fossils?

796

---

Explain valley?

833

---

How has the earth evolved since formation?

811

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