0
because as a solid, the earth is more dense, but as a liquid the magma expands, causing pressure. because as a solid, the earth is more dense, but as a liquid the magma expands, causing pressure.
Wiki User
∙ 15y ago
Wiki User
∙ 12y agoWell, first off, heat rises. But that is only part of the equation. The farther down to the core of Earth you go the more pressure buildup there is. So the magma which is underneath the ground is under constant pressure from the heat buildup and the Earth\'s natural pressure. When a hole opens up the the magma will relieve pressure by moving to the area of least resistence. Viola! Volcano creation.
Wiki User
∙ 13y agothe magma has a lower density than the surrounding rocks
and it is also forced to be pushed out
Wiki User
∙ 13y agolots of gases and pressure moving the magma up.
Wiki User
∙ 12y agoThe pressure of tectonic plates forming under the ground builds up. and creates the pressure.
Add your answer:
Earn +20 pts
Could property of magma that cause it to be forced upward towards earth surface?
Because magma is less dense than the surrounding solid rock, it is forced upward toward the surface. When magma reaches the surface and flows from volcanoes, it is called lava.
What type of air is always forced upward at a front?
WARM
Can density differences force magma upward into cooler layers on earths interior?
no
What type of mountain is form by upward movements by ckunks of earths crust?
I believe it's Andes Mountains.
What kind of mountain range is formed when rock layers are sqeezed and forced upward?
fold mountain
Could property of magma that cause it to be forced upward towards earth surface?
Because magma is less dense than the surrounding solid rock, it is forced upward toward the surface. When magma reaches the surface and flows from volcanoes, it is called lava.
Density causes hot plastic-like rock to be forced upward towards the surface to cool and then sink. This cycle is called a current?
convection current
These are created when sections of the earths surface are folded and thrust upward?
mountains
What is the correct order upward from earths surface?
Troposphere, Stratosphere, Mesosphere, Thermosphere, and Exosphere - layers of the atmosphere :)
An object at rest on the earths surface has two forces acting upon it what are they and why doesnt the object move?
Gravity and the upward force of the surface the object is resting on.
Magma from deep inside earth rises toward the surface because?
Because magma is less dense than surrounding solid rock, so it is forced upward toward the surface.
What can allow melted rock to ooz out In a lava flow?
magma is less dense than the surrounding rock, so it is forced upward to the earth's surface
What can allow melted rock ooze out in a lava flow?
magma is less dense than the surrounding rock, so it is forced upward to the earth's surface
What causes magma to flow upward thought the earths surface?
The tectonic plates push together thus causing magma to shoot up and rise hence an eruption
What causes the lava to be forced upward?
pressure
What type of air is always forced upward at a front?
WARM
Slope of a line that slants upward?
If the line slants upward (going towards the right), then the slope is positive.
