百度试题 结果1 题目What is volcanic rock formed from? A. Water B. Air C. Magma D. Soil 相关知识点: 试题来源: 解析 C。解析:文章开头提到“Volcanic rocks are formed when magma from deep inside the earth comes out.”。 反馈 收藏
What type of magma forms at mid-ocean ridges? What happens after magma is formed? Which igneous rock forms when basaltic lava hardens? What forms when a large volcano collapses in on itself? What are the two types of magma? In what ways can magma be generated from solid rock?
Heather: Well, there are three main types of rock. Igneous, sedimentary, and metamorphic. Rocks from volcanoes are igneous rocks. They form when this liquid lava cools down and turns solid. Kids: The lava cools down which makes it really hard, which makes the rock a rock. Heather: And ...
Igneous rocks are of two types, intrusive and extrusive. Intrusive igneous rocks are formed when the magma cools off slowly under the earth’s crust and hardens into rocks. Gabbro and granite are examples of intrusive igneous rocks. Rapid cooling results in smaller crystals while slow cooling res...
Alkali magmatites from the 94 Ma old Magnet Cove Igneous Complex (MCIC) include aphanites and phanerites of insufficient mineralogical and chemical characterization. Main reasons are the small grain size of the minerals and the presence of a hydrothermal alteration mineralogy. Both make the ...
The mantle is mostly made up of rock, but it also includes some magma(岩浆). Magm a is liquid rock that has melted(融化) under high heat and pressure. It often col lects in underground space, and can finally come out from volcanoes(火山).Finally, there's the earth's thin outer ...
Magma is liquid rock that has mel- ted(融化) under high heat and pressure. It often collects in underground space, and can finally come out from vol- canoes."并结合地理知识可推知,volcanoes 指的是火 山,图片B为火山。 故选B。 4.D 【解析】推理判断题。 题干意为:从最后一段中,我 们...
The basic feature of rocks is that all the rocks are mixtures. Coal, oil and natural gas belong to combustible organic rock, not mineral. (how minerals are formed) a pathway for forming minerals; one is through magmatic activity. In magma there are various elements of the earth. These ...
Fine-grained igneous rock is one of two major types of igneous rock. Those with fine grains are called extrusive, and those with coarse grains are intrusive. Extrusive igneous rocks form outside of the Earth's surface, while intrusive igneous rocks form beneath the Earth. ...
Rock that cools down under the earth’s surface is known as intrusive rock. Magma, known as lava when expelled from volcanoes, solidifies quickly when in contact with the atmosphere, and is known as extrusive rock. This stage can affect any of the three main types of rock. Metamorphic ...