on April 16, 2022
When was Mount St Helens found?
GeologyHelens on 19 May 1792, while surveying the northern Pacific Ocean coast. Vancouver named the mountain for British diplomat Alleyne Fitzherbert, 1st Baron St Helens on 20 October 1792, as it came into view when the Discovery passed into the mouth of the Columbia River. When was Mount Saint Helens discovered? Helens ‘Louwala-Clough,’ or ‘smoking
on April 16, 2022
What are the characteristics of continental and oceanic crust?
GeologyIt is the solid rock layer upon which we live. It is either continental or oceanic. Continental crust is typically 30-50 km thick, whilst oceanic crust is only 5-10 km thick. Oceanic crust is denser, can be subducted and is constantly being destroyed and replaced at plate boundaries. What is a characteristic of oceanic crust?
on April 16, 2022
Which plate collisions would most likely result in a subduction zone?
GeologyWhich plate collisions will produce subduction? Subduction occurs when two plates collide at a convergent boundary, and one plate is driven beneath the other, back into the Earth’s interior. What two types of collisions cause a subduction zone? When an oceanic and a continental plate collide, eventually the oceanic plate is subducted under the continental
on April 16, 2022
Are repaired sinkhole homes safe?
GeologyIn general, if a repair has been certified by a licensed engineer and completed to the satisfaction of the homeowner’s insurance company, it is likely safe. However, since these are natural systems, there can be no guarantees that a repaired sinkhole will not cause future problems. Has anyone been recovered from a sinkhole? 28, 2013,
on April 16, 2022
Why are organisms that are buried rapidly?
Geology3. Why are organisms that are buried rapidly more likely to fossilize than those that are buried slowly or not at all? Rapid burial protects an organism from biotic factors such as scavengers and decomposers, and from abiotic factors such as sun and wind, allowing the fossilization process to begin. Why is rapid burial? Why
on April 16, 2022
How do you break through a rock?
GeologyIce wedging As the water freezes, it expands. This expansion exerts tremendous pressure on the surrounding rock and acts like a wedge, making cracks wider. After repeated freezing and thawing of water, the rock breaks apart. How do you break a rock easily? Quote from video:And tap each wedge a couple times to secure it
on April 16, 2022
What do polar wander paths tell us?
GeologyThe concept of apparent polar wander paths was helpful in determining the speed, direction, and rotation of continents. What do polar wander curves tell us? That polar-wandering curves for different continents (which show the paths of a magnetic pole with respect to a given continent) do not agree was one of the first important evidences
on April 16, 2022
What are the components of environmental science?
GeologyComponents of Environmental Science Atmospheric Sciences. … Environmental Chemistry. … Forestry and Agricultural Sciences. … Geosciences. … Oceanography and Marine Sciences. What are the 5 components of environment? The five components of our environment are: atmosphere, lithosphere, hydrosphere, biosphere and solar energy. Atmosphere is the gaseous layer enveloping the Earth. … Lithosphere is the outermost
on April 16, 2022
Which gas was absent during the Archean era?
Geologyoxygen gasThe Archean Eon (4 to 2.5 billion years ago) There was no oxygen gas on Earth. Oxygen was only in compounds such as water. Complex chemical reactions in the young oceans transformed carbon-containing molecules into simple, living cells that did not need oxygen to live. What are the major gases of the Archean period?
on April 16, 2022
Why are mountains so tall?
GeologyMountains often form when pressure under Earth’s surface pushes upward, yet many factors impact their ultimate height, including the erosion of the areas between mountains, known as channels. Do mountains get taller or shorter over time? This is what we call isostasy. Because of isostasy, mountains aren’t shortened as fast as they would otherwise be