Convection occurs because: Question 11 options:

Small earthquakes occur within the Earth’s crust causing rocks to shake and change temperature.

Oceanic crust is being destroyed at deep ocean trenches.

Molten rock comes close to the Earth’s core it heats up, becomes less dense and rises and the molten rock near the Earth's crust cools down, becomes more dense, and sinks causing the cycle of convection.

Convection does not occur within the Earth.

specific gravity is the density of a substance divided by the density of water. since (at standard temperature and pressure) water has a density of 1 gram/cm3, and since all of the units cancel, specific gravity is usually very close to the same value as density

so "c" is the answer

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hi,

the capital city of australia is canberra.

we can conclude that the melting point of table salt is above room temperature (it's actually 801 deg c). the melting point of mercury must be below room temperature (- 39 deg c).

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