The first rock that crystallises from magma will be the one with the one having lowest melting point. This is because the rocks with the highest melting point will remain in the magma longer, and will thus be the last to crystallize.
The first rock that crystallises from the magma will be the one with the lowest melting point because the magma will cool and crystallize from the bottom up. The rocks with the lowest melting point will crystallize first, followed by the rocks with the higher melting point. This process is known as fractional crystallization.Fractional crystallization is a process of crystallisation in which a melt of a single composition breaks up into a solid solution with more than one phase.
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What is the relative location of most of Canada’s islands?
Answer:
Near the arctic circle.
andesitic lava tends to erupt from volcanoes that form along subduction zones. what magma forming process creates andesitic lava?
Answer:
The magma forming process that creates andesitic lava is called fractional crystallization.
Explanation:
The magma forming process that creates andesitic lava is called fractional crystallization. This process happens when a magma chamber cools and crystallizes, and the different types of minerals that form crystallize at different rates. The slower-crystallizing minerals tend to sink to the bottom of the magma chamber, while the faster-crystallizing minerals rise to the top. When the magma is erupted, it is richer in the faster-crystallizing minerals, which gives it an andesitic composition.
What are the possible causes of the change in temperature during the Quaterinary period?
Answer:
At the start of the Quaternary, the continents were just about where they are today, slowing inching here and there as the forces of plate tectonics push and tug them about. But throughout the period, the planet has wobbled on its path around the sun. The slight shifts cause ice ages to come and go.
global climate models cannot predict the exact global average temperature of the earth in the year 2100 with total certainty. explain two different reasons for this fact. be specific and detailed in your explanations.
Global Climate Models are used for general trends, but due to anthropogenic activities and natural variability, they will not be able to accurately forecast the precise climate in the years ahead at specific moments in time.
There is no way to foresee natural disasters, therefore accuracy may not be able to account for a specific event in the earth's system.It is challenging to start the model since some areas do not have data for climatic parameters, and we do not even have measurements at all times. Clouds are the biggest source of doubt in global climate models because we don't completely grasp their physics.
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Answer:
Worldwide Environment Models are utilized for general patterns, however because of anthropogenic exercises and normal fluctuation, they can not precisely gauge the exact environment in the years ahead at explicit minutes in time.
Explanation:
It is basically impossible to predict catastrophic events, subsequently precision will be unable to represent a particular occasion in the world's system.It is trying to begin the model since certain areas don't have information for climatic boundaries anthropogenic and we don't have estimations consistently. Mists are the greatest wellspring of uncertainty in worldwide environment models since we don't totally get a handle on their material science.
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A free-market system, which is largely controlled by market forces such as
supply and demand, is best defined by which of the following?
OA. Socialism
OB. Capilism
OC. Unionism
OD. Communism
how does a muscle pull a bone
Answer:
Muscles are attached to bones by tendons and help them to move. When a muscle contracts (bunches up), it gets shorter and so pulls on the bone it is attached to. When a muscle relaxes, it goes back to its normal size. Muscles can only pull and cannot push. Therefore muscles have to work in pairs to move a joint.
Explanation:
Hoped dat help
if you were drilling for groundwater instead of oil, what type of sedimentary rock would you target to produce the maximum amount of fresh water from your well?
Because of its great permeability, sandstone is the sedimentary rock type you should aim for if extracting the most freshwater out of the well.
A body of permeable rock or sediment filled with groundwater is known as an aquifer. When it rains, groundwater seeps into an aquifer via the soil. Through springs and wells, it can surface after moving through the aquifer.
Sand-sized silicate granules make up the majority of the clastic sedimentary rock known as sandstone. About 20–25% of overall sedimentary rocks are sandstones. Because quartz and feldspar are the minerals that resist weathering the most at the Earth's surface, they make up the majority of sandstone.
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How can countries without natural resources acquire them? (give two examples)
what is the name for the divide that sends water to the mississippi river and the atlantic ocean?
Continental divide is the name for the divide that sends water to the Mississippi river and the Atlantic ocean.
A natural ridge or border that divides a continent's river systems is known as a continental divide. A different ocean basin, bay, or sea is fed by each river system.
Large drainage divisions that span entire continents are known as continental divides or simply divides. Watersheds of all sizes are divided by boundaries called divides. In elevated topography, such as mountain ranges or hills, drainage divides can occur at any scale.
In general, rain that falls on one side of the divide will go into one basin and rain that falls on the other side will go into a different basin.
In some instances, water flows toward an endorheic basin, like a salt flat or a salt lake. Endorheic basins, which don't connect to an ocean or another significant body of water.
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Explain how the GAC affects the weather and climate of the tropics. (6 marks)
Global atmospheric circulation (GAC)
The movement of air across the planet occurs in a specific pattern. The whole system is driven by the equator, which is the hottest part of the Earth. Air rises at the equator, leading to low pressure and rainfall.
When the air reaches the edge of the atmosphere, it cannot go any further and so it travels to the north and south. The air becomes cold and falls to create high pressure and dry conditions at around 30° north and south of the equator. Large cells of air are created in this way. Air rises again at around 60° north and south and descends again at around 90° north and south. Global atmospheric circulation creates winds across the planet and leads to areas of high rainfall, like tropical rainforests, and areas of dry air, like deserts.
Global circulation can be described as the worldwide system of winds by which the necessary transport of heat from tropical to polar latitudes is accomplished. In each hemisphere, there are three cells (Hadley cell, Ferrel cell, and Polar cell) in which air circulates through the entire depth of the troposphere. The troposphere is the name given to the vertical extent of the atmosphere from the surface, right up to between 10 and 15 km high.
Hadley cell
Hadley Cells are the low-latitude overturning circulations that have air rising at the equator and air sinking at roughly 30° latitude. They are responsible for the trade winds in the Tropics and control low-latitude weather patterns.
The largest cells extend from the equator to between 30 and 40 degrees north and south and are named Hadley cells, after English meteorologist George Hadley. Within the Hadley cells, the trade winds blow towards the equator, then ascend near the equator as a broken line of thunderstorms, which forms the Inter-Tropical-Convergence Zone (ITCZ). From the tops of these storms, the air flows towards higher latitudes, where it sinks to produce high-pressure regions over the subtropical oceans and the world's hot deserts, such as the Sahara desert in North Africa
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When does a volcano occur?
Answer:
Volcanoes erupt when molten rock called magma rises to the surface. Magma is formed when the earth's mantle melts. Melting may happen where tectonic plates are pulling apart or where one plate is pushed down under another. Magma is lighter than rock so rises towards the Earth's surface.
Explanation:
Why and how do volcanoes actually erupt?
Volcanoes erupt when molten rock called magma rises to the surface. Magma is formed when the earth's mantle melts.
Melting may happen where tectonic plates are pulling apart or where one plate is pushed down under another.
Magma is lighter than rock so rises towards the Earth's surface. As the magma rises, bubbles of gas form inside it.
Runny magma erupts through openings or vents in the earth's crust before flowing onto its surface as lava.
If magma is thick, gas bubbles cannot easily escape and pressure builds up as the magma rises.
When the pressure is too much an explosive eruption can happen, which can be dangerous and destructive.
Another way an eruption happens is when water underneath the surface interacts with hot magma and creates steam,
this can build up enough pressure to cause an explosion.
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the riverbed of the yellow river is currently 20 meters above the floodplain, which would normally cause it to change course. what allowed the river to reach this condition?
The construction of levees is why the river reached this condition.
what is a flood plain?
A relatively flat region of land near a river or stream is referred to as a floodplain (or floodplain). It extends from the river's banks to the valley's outer reaches. A floodplain is divided into two sections. The first is the floodway, which is the river's main channel.
A levee is a dam with a specific function: to guard against floods caused by seasonally high water. Levees are vulnerable to water loading for only brief periods each year, ranging from a few days to a few weeks, unlike small earth dams. They must therefore be created and designed using levee-specific standards.
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