During a volcanic eruption or on a constructive boundary
Have you ever heard of the rock cycle? The Earth can never run out of magma unless the rock cycle stops working. Igneous rocks melt creating magma, and that magma is used to create other igneous rocks. SEARCH FOR THE ROCK CYCLE AND REVIEW IT, YOU WILL GET A BETTER UNDERSTANDING OF WHAT YOU ARE ASKING.
Ok first there is no possible way the earth would ever run out of magma but if it does run out on magma there would be no lava left and we would all die.
No. Minerals are constantly being broken down and re-formed.
The opening in the earth crust which magma rise to the surface are Volcanoes
Rocks become less dense when they melt
Volcanoes occur when the earth cools off, and releases internal heat and pressure. Magma is a lower density than the surrounding rocks, and this causes it to rise to the surface. As it rises, gas bubbles form in the magma, exerting pressure, causing the magma to erupt out of the surface of the earth.
Deep down in the Earth it is so hot that sometimes melts rocks and that becomes a substance called magma. The magma will rise and collect in magma chambers, which over times causes the magma to push through the Earth's surface. That is what is known as a volcanic eruption.
Earth plates MUST pull apart.
The opening in the earth crust which magma rise to the surface are Volcanoes
Near the tech-tonic plates of the earth.
cuz
Magma rises from the asthenosphere to the surface of the Earth. After it reaches temperature upward to 1000 degrees Fahrenheit, the magma starts to rise. Gases also aid in pushing the magma toward the surface, along with the tremendous pressure from the depth at which it originates.
Magma rises because it is less dense than the rock around it.
Yes, magma tends to rise towards the earth's surface. It does so because once melted it becomes less dense.
Magma tends to rise towards Earth's surface primarily because rocks become less dense when they melt. The hotter the magma, the more the rocks are likely to "float," if you will.
because of the high pressure
Through cracks, holes or vents in the earths crust.
Rocks become less dense when they melt
Volcanoes occur when the earth cools off, and releases internal heat and pressure. Magma is a lower density than the surrounding rocks, and this causes it to rise to the surface. As it rises, gas bubbles form in the magma, exerting pressure, causing the magma to erupt out of the surface of the earth.
this answer has to do with density if magma becomes less dense than rock it will rise to the top ,for example vegetable oil in water.