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Both. (the sun & radioactivity).

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8y ago

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Does the earth have a top and a bottom?

The Earth's top and bottom are defined by the North and South poles, respectively. The concept of top and bottom is based on human perception, as Earth is a sphere with no true top or bottom in space.


How do convention currents move?

Heated from the bottom, the warmer substance will slowly rise to the top while the cooler substance at the top falls to the bottom to be heated again. Look at a lava lamp. That is all about convection currents.


What are the flat bits at the top and the bottom of the earth called?

The earth is round, due to gravity, so there are no flat bits at the top and bottom.


Why does the Earth's crust move on top of the magma when getting heated by the earth's core?

Convection currents move the magma around in circles up and down as it gets cooled and heated. And the plates move on top of them.


What is hemisphere's?

Top or bottom half of the earth


Is the southern hemisphere the bottom part of the Earth?

No, the top.


Where is earth wire attached to?

it is the top or bottom of the equipment..........


Why doesnt convection occur when a beaker is heated at the top?

Convection occurs when heated fluid rises and cooler fluid sinks, creating a continuous circulation. If a beaker is heated at the top, the heated fluid near the top would rise but due to cooler fluid at the bottom, the circulation does not sustain itself, thus preventing convection from occurring.


Name given to icy areas at top and bottom of earth?

The icy areas at the top and bottom of the Earth are called the Arctic (at the North Pole) and the Antarctic (at the South Pole).


Is Antarctica on the top of the Earth or on the bottom?

Antarctica is located at the southern most point on the earth and encompasses the South Pole. Basically, it's at the bottom of the earth.


The distance from the top to the bottom of the Earth is called?

Latitude


What is line that splits the earth from the top to the bottom?

a line of longitude