What is the average ocean temperature? Although ocean temperatures vary depending on depth and latitude, scientists es…

Who first determined the Earth's circumference? Eratosthenes, a Hellenistic geographer (273-193 B.LL) in Alexandr…

What were some early ideas about the Earth's age? In 1644, John Lightfoot (1602-1675) calculated the age of the E…

What are some of the oldest rocks so far discovered on Earth? Scientists have found rocks exceeding 3.5 billion years …

What are perihelion and aphelion when talking about the Earth and sun? The Earth does not spin around the sun in a …

Whal is Ihe exact circumference of Ihe Earth? The Earth's circumference is 24,901.55 miles (40,075.16 kilometers) …

Where is the Earth situated in relationship to the other planets? The Earth is the third planet from the sun; it is al…

How fast does the Earth orbit around the sun? The Earth travels around the sun at a velocity of about 18.6 miles (29.8…

Why are longitude and lalitude important to geologists? In order to describe any location on Earth, most scientists, i…

What are the Van Allen radiation bells? No one knew the Van Allen radiation belts existed until the first American sa…

Why does the Earth have seasons? Contrary to popular belief, the Earth's seasons are not caused by the varying dist…

What is the Earth's average density? The Earth's average density is about 5.52 grams per cubic centimeter-the …

What are some statistics on the Earth's geologic features? The Earth's geologic statistics include many interes…

Why is the carbon dioxide in our atmosphere so important? We should all be thankful for the carbon dioxide in our atmo…

Whal elemenls are found in Ihe Earth's almosphere? The Earth's atmosphere is composed of about 77 percent nitr…

Whal are some major statistics aboul the Earth? The following lists some major statistics about our planet. (Note: as …

How fast does the Earth rotate on its axis? If you stand at the Earth's equator, you are moving approximately 25,0…

What was James Hutton's contribution to geology? James Hutton (1726-1797) was a Scottish natural philosopher, b…

What did Nicolaus Steno contribute to geology? Nicolaus Steno (Niels Stensen; 1638-1686) was a Danish geologist an…

What is neptunism, catastrophism and plutonism? By the end of the 18th century  - often cal1ed the "heroic age&q…