MadSci FAQ: Earth Questions

Basic Earth Facts:

Grade 4-6 Question: How old is the earth? Answer
Grade 10-12 Question: What are the names of some of the oldest rocks on earth? Answer
Grade 4-6 Question: How much does the earth weigh? Answer
Nonaligned Question: Is the earth really a sphere? Answer

Interior of the earth:

Grade 10-12 Question: How do we know what the inside of the earth is like? Answer
Nonaligned Question: What are the volume and mass percentages of the layers of the earth? Answer
Grade 4-6 Question: How hot is the center of the earth, and how do you know? Answer
K12 Teacher Question: How was it discovered that the inner core of the earth is solid? Answer
Mr. Hill's 5th grade class Question: Why is the inner core of the Earth solid, even though it is hotter than the liquid outer core? Answer

Surface features of the earth:

Grade 10-12 Question: How did the land forms on earth get there? Answer
Nonaligned Question: Why is the majority of the earth's landmass in the northern hemisphere? Answer
Grade 4-6 Question: How does sand get into the deserts? Answer
Nonaligned Question: How deep is the deepest ocean? Answer
Grade 10-12 Question: What are the deepest and lowest points of the Atlantic and Pacific Oceans? Answer
K-12 Teacher Question: How deep is the deepest hole ever dug by mankind? Answer
Grade 7-9 Question: How high is mount Everest? Answer
Grade 7-9 Question: How did the Ural mountains form? Answer