Posted on April 16, 2022 (Updated on July 9, 2025)
How does heat flow vary over Earth’s surface?
Regional SpecificsSo at the top of the asthenosphere, the hot rock flows along the bottom of the lithosphere, transferring its heat to the cold rocks by conduction. The heat then flows through to the surface, again by conduction. What does heat flow depend on? The rate of heat transfer depends on the material through which heat
Posted on April 16, 2022 (Updated on July 9, 2025)
How does radioactive decay determine the age of rocks?
Regional SpecificsThe age of rocks is determined by radiometric dating, which looks at the proportion of two different isotopes in a sample. Radioactive isotopes break down in a predictable amount of time, enabling geologists to determine the age of a sample using equipment like this thermal ionization mass spectrometer. How is radioactive decay used to date
Posted on April 16, 2022 (Updated on July 9, 2025)
Why is a divergent boundary also called a constructive boundary?
Regional SpecificsAt a divergent plate boundary – also known as a constructive plate boundary, the plates move apart from one another. When this happens the magma from the mantle rises up to make (or construct) new crust. The movement of the plates over the mantle can cause earthquakes. Rising magma can also create shield volcanoes .
Posted on April 16, 2022 (Updated on July 9, 2025)
How does water shape the earth?
Regional SpecificsWater moving across the earth in streams and rivers pushes along soil and breaks down pieces of rock in a process called erosion. The moving water carries away rock and soil from some areas and deposits them in other areas, creating new landforms or changing the course of a stream or river. How does water
Posted on April 16, 2022 (Updated on July 9, 2025)
How much damage did the Anchorage earthquake cause?
Regional SpecificsThe four minute duration of shaking triggered many landslides and avalanches. Major structural damage occurred in many of the major cities in Alaska. The damage totalled 300-400 million dollars (1964 dollars). The number of deaths from the earthquake totalled 131; 115 in Alaska and 16 in Oregon and California. How strong was the earthquake in
Posted on April 16, 2022 (Updated on July 9, 2025)
What was the worst earthquake in US history?
Regional SpecificsThe Largest Earthquakes in the United States RANK MAGNITUDE DATE 1. 9.2 March 28, 1964 2. 8.8 March 9, 1957 3. 8.7 Feb. 4, 1965 4. 8.3 Nov. 10, 1938 What are the 5 largest earthquakes ever recorded in USA? 5 of the most devastating earthquakes in US history Charleston, South Carolina 1886. Northridge, California