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Geology Physical Science Formation Asteroids

03/18/19

How are boulders formed on asteroids?

For example: Are they soft landed meteorites? Or do they form from melted material during a violent impact? Or are they the result of some kind of erosion process?

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Geology Water Hydrology

03/18/19

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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Geology Mantle Drilling

03/18/19

How straight is the Kola superdeep borehole?

The legendary Kola superdeep borehole is about 12 km deep. To achieve such depth, a major difficulty is to make sure the borehole is vertical straight. Intuitively, when the borehole is deep... more

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Geology Physical Science Teaching Rocks

03/18/19

How to learn the different types of rock?

I would like to be able to point to a piece of rock and say that is rock type *such and such*. I have tried learning but it literally seems like an endless list of types and sub types and the... more

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Geology Physical Science Economic Geology Geochronology

03/18/19

In what geological situations can I find gold?

I've heard that gold ore is often associated with quartz veins. What geological processes enable gold particles to naturally cluster together like this? What characteristics/properties should I... more

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Geology Mass Extinction Geologic Layers

03/18/19

How is geological time divided into units?

Earth's history is divided into eons, which are divided into eras, which are divided into periods etc. Consecutive time units differ in their geology and/or fossil species. But what events are the... more

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Geology Physical Science Gas Petroleum

03/18/19

What's it like inside a natural gas cavern on Earth?

I suppose natural gas underground caverns on Earth have substantial volume and gas is in gaseous form there. As such I wonder how it would look like inside such cavern (with artificial light of... more

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Geology Physical Science Petrology

03/18/19

When can taste be used to help identify rocks?

Taste can be used to distinguish halite (ordinary salt) from sylvite (which has some bitterness) and siltstone from mudstone (the latter has a creamy texture while the grains of the former can be... more

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Geology Physical Science Earth

03/18/19

Why is the Earth's center still hot after millions of years?

Why didn't the center of the earth cool after millions or billions of years? What keeps it hot?

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Geology Physical Science Geophysics

03/14/19

How is the mass of the Earth determined?

According to textbook knowledge, the mass of the Earth is about $6 × 10^{24}\\,\\mathrm{kg}$. How is this number determined when one cannot just weight the Earth using regular scales?

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Geology Chemistry Geography Earth Science

03/14/19

Why is iron not the second most abundant element in the earth's crust?

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Geology Physical Science Earth Rotation

03/14/19

Why isn't Earth a perfect sphere?

In general, almost everyone describes Earth as an perfect sphere, but in reality it isn't a perfect sphere. Is there any specific reason why Earth is not perfect sphere ?

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Geology Ecology Social Studies

03/11/19

Which of the following statements is FALSE about explosive volcanic eruptions? Select all that apply. SELECT AN ANSWER

Which of the following statements is FALSE about explosive volcanic eruptions? Select all that apply.SELECT AN ANSWERThey are responsible for most volcano-related deaths.They occur when magma is... more

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Geology

03/08/19

The zone of earthquakes in the subduction zone at both ocean to ocean and ocean to continent convergent margins is called the

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Geology Logic Algebra

02/25/19

How Old Is The Rock?

A certain element has a half life of 4.5 billion years. a. You find a rock containing a mixture of the element and lead. You determine that 35% of the original element remains; the other 65%... more

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Geology Science

02/20/19

which plate is almost totally surrounded by divergent boundaries ?

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Geology Algebra 2

02/13/19

Math question help pls

The White (Chalk) Cliffs of Dover are approximately 120 meters (m) thick. They are composed of biogenic sediment once on an abyssal plain.If these sediments accumulate at rates of 0.2mm/year how... more

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Geology Science Biology Archaeology

01/31/19

When was the first mass extinction

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Geology Science

01/22/19

I need help identifying if a rock is igneous, sedimentary or metamorphic.

I just need help identifying if a rock is igneous, sedimentary or metamorphic. The merlot rock (the one on the top left) is smooth and the rest feels kind of grainy.Images of rocks:... more

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Geology Science

01/14/19

What are some open-ended questions about Earth's history or geology?

An open-ended question is something that can be explored and doesn't have a certified answer already.An example of what I'm looking for is: How does Earth change over time?

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Geology Physical Science

01/10/19

What physical characteristics of the bedrock are responsible for the oldest rock remaining at the highest elevation?

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Geology Chemistry Physics Geography

11/29/18

In the framework of the concept of heat piracy, which of these processes could have helped cool the North Atlantic during the Younger Dryas cold period?

Select one:a. Weakening of AABWb. Weakening of NADW formation relative to AABWc. Freshening of AABWd. Strengthening of NADW

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Geology

11/27/18

Geology question

5. You notice the following in a stream-cut gorge. In the lower part of the gorge you see a bedrock surface with linear scratches and polish that is overlain by a 12 meter think layer of poorly... more

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Geology

10/15/18

Storm surges occur because...?

a. low air pressure associated with the hurricane allows the ocean surface to riseb. hurricane-force winds "pile" up water near coasts as the storm moves onshorec. people surge inlands as they... more

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Geology

10/15/18

waves that wash onto beaches at an angle are responsible for which of the following?

a. longshore currentsb. neap tides and spring tidesc. continental driftd. wave refractione. littoral drift

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How are boulders formed on asteroids?

What keeps water from sinking into earth?

How straight is the Kola superdeep borehole?

How to learn the different types of rock?

In what geological situations can I find gold?

How is geological time divided into units?

What's it like inside a natural gas cavern on Earth?

When can taste be used to help identify rocks?

Why is the Earth's center still hot after millions of years?

How is the mass of the Earth determined?

Why is iron not the second most abundant element in the earth's crust?

Why isn't Earth a perfect sphere?

Which of the following statements is FALSE about explosive volcanic eruptions? Select all that apply. SELECT AN ANSWER

The zone of earthquakes in the subduction zone at both ocean to ocean and ocean to continent convergent margins is called the

How Old Is The Rock?

which plate is almost totally surrounded by divergent boundaries ?

Math question help pls

When was the first mass extinction

I need help identifying if a rock is igneous, sedimentary or metamorphic.

What are some open-ended questions about Earth's history or geology?

What physical characteristics of the bedrock are responsible for the oldest rock remaining at the highest elevation?

In the framework of the concept of heat piracy, which of these processes could have helped cool the North Atlantic during the Younger Dryas cold period?

Geology question

Storm surges occur because...?

waves that wash onto beaches at an angle are responsible for which of the following?

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