MACHINE:-. A machine is a tool containing one or more parts that uses energy to perform an intended action. Machines are usually powered by mechanical, chemical, thermal, or electrical means, and are often motorized. MACHINE TOOL:-. Machine tool is also the machine but it must have the following things.
Lava is made up of crystals, volcanic glass, and bubbles (volcanic gases). As magma gets closer to the surface and cools, it begins to crystallize minerals like olivine and form bubbles of volcanic gases.When lava erupts it is made up of a slush of crystals, liquid, and bubbles.The liquid freezes to form volcanic glass. Chemically lava is made of the elements silicon, oxygen, aluminum, iron, magnesium, calcium, sodium, potassium, phosphorus, and titanium (plus other elements in very small concentrations.Have a look at the background information in Minerals, Magma, and Volcanic Rocks.he liquid freezes to form volcanic glass. Chemically lava is made of the elements silicon, oxygen, aluminum, iron, magnesium, calcium, sodium, potassium, phosphorus, and titanium (plus other elements in very small concentrations. Have a look at the background information in Minerals, Magma, and Volcanic Rocks.
A dome volcano is a round shaped mountain made of viscous lava. The lava has a high silica content that prevents the lava from flowing very far from its vent. Most domes are formed by dacite and rhyolite lavas.Dacite dome in central Oregon, Myrna Martin.ther small domes form on the side of large composite volcanoes. A lava dome on the slopes of a composite volcano can become unstable when hot lava erupts causing pyroclastic flows to form on its slopes.