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Are volcanic eruptions caused by the movements of tectonic plates?
Usually, volcanic eruptions above water are the result of a magma-plume burning through a spot in the Earth's crust, or by the rising part of a magma convection cell. Such conditions are often found near the edges of the continental plates. There are also spots where the Earth's crust is so thin that magma breaks through even without there being a plume, such as near oceanic ridges. Most of the volcanic eruptions on this planet take place under water, near oceanic ridges.
Streamlike movements of water at or near the surface of the ocean are called?
Stream like movements of water that occur near the surface of the ocean are called surface currents. Stream like movements of ocean water far below the surface are known as a deep current.
Why is the ocean water off the west coast cold?
The water there is cold because of the ocean currents in the pacific which circulate the cold and warm water in a circular pattern, and it just so happens that on the west coast is near the section of the current bringing cold water south from the arctic. But elsewhere, this depends on local currents. In the Tasman Sea for example, a warm anti-clockwise current flows up the west coast of New Zealand and promotes a warmer, but wetter climate.
Where would you find the highest salinity?
Salinity varies throughout the world's oceans though it usually ranges between 34-37%; variation can occur because of many different factors, including atmospheric conditions and surrounding oceanic currents. Generally, the highest salinity occurs where evaporation rates are highest, near subtropical highs.
Where is an earthquakes near near?
This literally makes no sense.
What movement indicates convection in the air?
Rising air currents indicate convection in the air. As air near the Earth's surface is heated, it becomes less dense and rises. This creates a convection current where warm air rises and cooler air sinks to take its place.
How convection currenet work in molten rock?
In molten rock, convection currents occur due to the movement of hot material rising and cooler material sinking. As the molten rock near the Earth's core heats up, it becomes less dense and rises towards the surface. As it cools at the surface, it becomes denser and sinks back down. This continuous cycle of rising and sinking creates convection currents that can drive tectonic plate movements.
What is convection and how does it cause plates to move?
Convection is the transfer of heat through the movement of a fluid, such as a liquid or gas. In the Earth's mantle, hot magma rises near the core, is cooled near the surface, and then sinks back down. This continuous cycle of rising and sinking creates convection currents that drag tectonic plates along with them, causing the plates to move.
What is an example of a convection of a convection current?
An example of a convection current is the movement of hot air rising and cold air sinking in a room heated by a space heater. As the heater warms the air near the floor, it becomes less dense and rises while cooler air from higher up moves down to replace it, creating a circulating convection current.
How is air heated near the earths surfaces?
It's heated through the convection currents.
How does convectinal currents occur in the mantle?
Convective currents in the mantle are driven by heat from the Earth's core. As the core heats the mantle, hot magma rises upwards, cools near the surface, and then sinks back down due to its increased density. This continuous cycle of rising and sinking creates convection currents in the mantle.
What are Convetion Currents?
convection currents are when hot rock from deep inside the the earth rises but cooler rock near the surface sinks
What does convection look like?
Convection is the movement of fluid due to differences in temperature within the fluid. In a visual sense, convection can be observed as the rising and sinking of fluid in a liquid or gas due to temperature variations. For example, in a pot of boiling water, convection currents can be seen as the water near the heat source rises while cooler water sinks.
How his thermal energy transferred from one to another by convection?
Convection currents occur in liquid. Heat excites the matter near the source and causes it to rise, making nearby matter rush in to fill the space. Then that matter is heated, rises, and so on. A good example of this is the Earth's mantle: heat from the core is dispersed by convection currents.
How does warm air move in the atmosphere?
Warm air moves in the atmosphere through a process called convection. As the air near the Earth's surface is heated by the sun, it becomes less dense and rises. This rising warm air displaces cooler air, creating a cycle of movement known as convection currents.
What happen when the convection current detector came near a heat source using spiral over candle pliers hanger and paper?
When the convection current detector comes near a heat source like a candle, the heated air rises due to convection, causing the paper spiral to move or spin. This movement is a result of the hot air near the heat source displacing the cooler surrounding air, creating a convection current that affects the paper spiral's position.
How do convection currents in the mantle effect lithosphere movement?
Convection currents in the mantle drive the movement of tectonic plates on the Earth's surface. As the mantle heats up and rises near mid-ocean ridges, it spreads and pushes the plates apart. When the mantle cools and sinks back down near subduction zones, it pulls the plates back together. This process of convection and plate movement is known as plate tectonics.
