When Is Pumice Stone Formed?
Pumice stone is formed when molten volcanic glass, ejected from beneath the earth’s crust, cools so rapidly that there is no time for it…
TellMeWhy
A wonderful and marvelous collection of answers to intriguing questions everyone ask about the world covering almost every subject, from science and history to art, language, mathematics, technology, and homeschooling
Who First Traveled the Length of the Amazon?
A party of Spanish explorers led by Francisco de Orellana became in 1541 the first Europeans to travel the length of the Amazon River.…
Is the Moon Moving Farther Away from Earth?
As the Moon travels around Earth, it affects Earth’s rotation. Scientists have determined that the Moon slowly gets farther away from Earth at the…
Where Is the Gulf Stream?
The Gulf Stream is in the Atlantic. It is a warm ocean current which flows steadily from the Gulf of Mexico north-eastwards. One branch…
How Were the First Mountains and Valleys Formed?
The first mountains and valleys were the crust formed as a result of the cooling of the molten mass of the earth. As the…