Question

Why the thickness of the earth's crust varies widely between continental masses and the ocean floor

Answer 1

These varying thickness of earth’s crust is basically due to continuous disturbances occurring beneath the earth crust.Our earth is consists of three layers, i.e., 1)Crust 2)mantle 3)core.

Mantle is consists of hard bedrock, while core consists of molten lava made of alloy of iron and nickel. So, due to molten core the inner layer of mantle also get heat up and become molten too and start moving towards the surface. But, during this movement this molten material loses it’s heat and get solidified again. This process keeps on repeating and is termed as convection currents. These convection currents results in continuous shifting of tectonic plates, which causes non uniform earth crust.

I hope will help u

Answer 2

Answer:

The oceanic crust is significantly younger than continental crust, which explains the difference in thickness. In addition, at subduction zones, the oceanic crust is continually recycled.

Explanation:

The definition of crust refers to a planet's outermost ring. All known life in the universe is contained in the 40 kilometres (25 miles) thick, 1% of the mass of our planet, thin crust. The crust, the mantle, and the core are the three layers of the earth. Solid rocks and minerals make up the crust. The mantle, which lies below the crust, is composed primarily of solid rocks and minerals but is occasionally broken up by pliable pockets of magma. A heated, dense metal core exists in the centre of the Earth. The crust and upper mantle are both parts of the lithosphere, a single geologic unit that is made up of the layers of the Earth that are always in contact with one another. The Mohorovicic discontinuity (the Moho), which marks the transition between the mantle and crust, is not always present in the lithosphere due to its variable depth.

To know more:

https://brainly.in/question/50810320

https://brainly.in/question/14998491

#SPJ2