1,302 Answered Questions for the topic physical science

Physical Science Geology Volcanology Carbonate

07/10/19

Volcanoes in the Great Barrier Reef?
Was there ever at any point in time a volcano in the great barrier reef? I thought atolls develop from volcanic islands, and the coral grow around them.
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Physical Science Water Meteorology Meteorite

07/10/19

Water on Mars and Earth?
If water on Earth came from meteorites, why doesn't Mars have substantial water? What made it more highly probable on Earth than on Mars?
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Physical Science

07/07/19

How to solve using the Ideal Gas Law
As the result of a chemical reaction, 19.8 g of CO2 gas is produced. Using the ideal gas law, determine the volimn of gas produced when the pressure is 1.00 atmosphere and the temperature is 33.0^C.
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Physical Science Geology Carbon Climate

07/07/19

What controls the acidity of the ocean?
I have learned that: * coral reefs are made up mostly of calcium carbonate * coral reefs are mainly distributed in the tropical zone * The calcium carbonate will be decomposed in the reaction... more
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Physical Science Geology Climate Climate Change

07/07/19

volcanic effects on the climate during Pangaea?
Which influence does the constellation of the continents have on the global climate? Was the biosphere more susceptible to climatic effects a volcanic eruption may cause during the Permian than it... more
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Physical Science Geology Plate Tectonics Tectonics

07/05/19

What structures form due to the melting of subducting plates?
What structures form from the melting of subducting plates? Plutons, Accretionary wedges, Deep sea trenches, Faults?
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07/05/19

What are 'articulate shells'?
I can not really find a definition, not even in a geologic dictionnary: What are articulate (resp. inarticulate) shells? To be more specific, the term is related to tsunami deposits (tsunamite).
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Physical Science Geology Geophysics

07/04/19

Why do we measure eustatic sea-level from the center of earth?
Earth is rotating so it has a ellipsoidal shape. The measurement will therefore be different from equator and pole. So why do we measure eustatic sea-level from the center of earth?
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Physical Science Geology

07/04/19

What is the motivation behind the choice of unglazed Porcelain as a Streak plate?
What characteristics does Porcelain possess that makes it a good choice for the Streak test? Additionally, are there any other materials that could also be used for designing a Streak plate?
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Physical Science Geology Petrology Volcanology

07/04/19

What is the source of lava of volcano? From magma below crust? Or from molten crust by rubbing?
Ok, it looks like a very simple question but I still have some point want to clarify... Most images explain volcanos contain some orange stuffs as magma below volcanoes as magma chamber, but the... more
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Physical Science Geology

07/03/19

What allowed the Himalaya to become so high?
Of course the mountains were caused by moving tectonic plates. But in case of the Himalaya mountains was the speed of the plates just higher so more energy got 'into' the mountains. Or was the... more
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Physical Science Geology Geochemistry Mineralogy

07/03/19

What is the difference between mineral groups and series?
It seems to me when reading about minerals, groups and series are spoken about interchangably in similar types of contexts. Is there a difference? If so, what?
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Physical Science Geology Fossils Fossil Fuel

07/03/19

Why does mineral oil occur below natural gas?
Why does mineral oil occur below natural gas? It was asked in our science book in the Geology section and I didn't get a clear explanation from the teacher.
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Physical Science Geology Geophysics Geodesy

07/03/19

What gravitational evidence do we have to counter the idea that oceans are formed when continents sink?
Is there some evidence for this based on gravity anomalies? I think I know how to tell if a mountain or structure is compensated based on bougeur and free air anomalies, but this really has me... more
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Physical Science Geology Geophysics

07/03/19

What is the difference between a geologist and a geophysicist?
What are the main differences between geologists and geophysicists?
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Physical Science Geology Minerals Earth History

07/03/19

Were all of Earth's minerals created before Earth's formation, during, or after?
I've heard that during the accretion of proto-planets that formed the earth, 60 minerals were created through the reactions of atoms and molecules in the nebula. Do these first minerals still make... more
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Physical Science Geology Ocean Oceanography

07/03/19

Uranium Deposits in the Ocean?
I was wondering whether there are any uranium deposits in the ocean floor, or in the rock walls of the continental shelf, etc. I was hoping to have some deep sea uranium deposits accessible from... more
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07/03/19

To what extent has the Earth's surface been geologically mapped?
To what extent has the Earth's surface been geologically mapped? For instance, what fraction has been surveyed at 1:10 000, 1:100 000 or 1:1 000 000 scale? Edit: By 'surface' I mean land surface,... more
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Physical Science Geology Water Hydrology

07/03/19

What keeps water from sinking into earth?
I remember reading somewhere that there's evidence of water on Mars but it all sank into the Martian soil. So what prevents that happening on earth? Some people say it's because the crust is not... more
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Physical Science Geology Rocks Structural Geology

07/03/19

what is a transverse isotropic rock?
I know isotropic means equal properties in all directions , but the term "transverse" is not making it easy for me to understand.
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Physical Science Physics

07/02/19

If the input force on a wheel and axle in 2n and the output force is 20n what is its mechanical advantage
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Physical Science

06/27/19

What happen to the eletrical energy that dose not become light energy
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Physical Science

06/26/19

what is the formula for iron(II) chloride?
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Physical Science Geology Geochemistry Petrology

06/25/19

Why are alkali basalts found at rifting centres and on top of 'plumes', whereas MORBs are generally tholeiitic?
So I was essentially wondering why it was that the basalts on top of 'plumes' at 'hotspots' (sometimes called OIBs, ocean island basalts) and at continental rifting centres are enriched in alkaline... more
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06/25/19

What was the likely composition of Earth's early crust (how did crustal composition evolve)?
Was the first crust entirely mafic (oceanic) crust which was later distilled via volcanic arcs along subduction zones to make felsic rocks or did the earth start with bits of felsic crust? Are the... more
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