What is oceanographers?
Explain how has the earth changed since it was formed?
How do you calculate the age of earth?
Define loam soil?
What is the difference between the geoid and the surface of the earth?
Explain which carbonate mineral reacts readily with cool dilute hydrochloric acid to produce visible bubbles of carbon dioxide gas?
What is crust?
why a cloud appears as black cloud and white cloud
Why did the continents spread apart?
Explain how old is the earth?
Do mountains exist on moon? How were they formed?
how does fog forms...???
Describe the formation of metamorphic rocks?