Hawaii's volcanoes, on the other hand, contain especially low-silica magmas made of basalt, which means they have much less explosive oomph.
Iconic cone-shaped volcanoes called stratovolcanoes, such as Mount Pinatubo, are loaded with silicic magmas. And just like opening a shaken-up can of soda, the resulting rush of vapor triggers an explosive eruption. When silicic magmas are no longer confined under sufficiently high pressure, the gases dissolved within them come out of solution and form bubbles. Rhyolite, an especially silica-rich type of lava, hits temperatures between only 1,200 degrees to 1,500 degrees Fahrenheit. These magmas are more than 63 percent silica, which makes them more viscous: At their runniest, silicic magmas flow about as well as lard orcaulk-which is to say not well at all. Silicic magmas, on the other hand, tend to form when the lighter continental crust melts. They contain between 47 to 63 percent silica, the mineral that makes up glass and quartz. Mafic magmas like those in Hawaii tend to form when the heavier crust that forms the ocean floor melts. Magmas vary in their chemical composition, which gives them-and the volcanoes that contain them-different properties. The molten rock is formed in the interior of some planets, including Earth, and some of their satellites, though such material located below the crust is referred to by other terms. The structures resulting from subsequent solidification and cooling are also sometimes described as lava. Lava is molten rock generated by geothermal energy and expelled through fractures in planetary crust or in an eruption, usually at temperatures from 700 to 1,200 ☌ (1,292 to 2,192 ☏). If this molten rock makes it to the surface and keeps flowing like a liquid, it's called lava. When geologists refer to magma, they're talking about molten rock that's still trapped underground. The distinction between magma and lava is all about location. But as the ongoing eruption captures headlines, a question might occur to the readers: What's the difference between magma and lava? There are two contents flow out as molten rock and they both have to do with volcanoes. Hawaii's Kilauea volcano keeps erupting with syrupy lava flows, serving as a fiery reminder of nature's destructive power. Questions number 6 to 9 are based on the following text. (E) The upper rear of our brain is at the pariental lob, and controls our complex behaviors, including senses such as vision, touch, body awareness and spatial orientation.(D) The location of parietal lobe is at the upper rear of our brain, and controls our complex behaviors, that is, senses such as vision, touch, body awareness and spatial orientation.(C) The parietal lobe is located far from the upper rear of our brain, and controls our complex behaviors, a part of senses such as vision, touch, body awareness and spatial orientation.(B) The parietal lobe is located near the upper rear of our brain, and controls our complex behaviors, senses such as vision, touch, body awareness and spatial orientation.(A) The parietal lobe can be in at the upper rear of our brain, and controls our complex behaviors, excluding senses such as vision, touch, body awareness and spatial orientation.The sentence ‘The parietal lobe is located at the upper rear of our brain, and controls our complex behaviors, including senses such as vision, touch, body awareness and spatial orientation’ In paragraph 5 can best be restated as A bundle of axons, called the corpus callosum, connects the two hemispheres.
The right hemisphere is considered our creative side, and the left hemisphere is considered our logical side.
And, while the two hemispheres look almost sy mmetrical, each side seems to function differently. Temporal Lobe – The temporal lobe is located near our ears, and is associated with processing our perception and recognition of auditory stimuli (including our ability to focus on one sound among many, like listening to one voice among many at a party ), comprehending spoken language, verbal memory, visual memory and language production (including fluency and word-finding), general knowledge and autobiographical memories.Ī deep furrow divides the cerebrum into two halves, known as the left and right hemispheres. Occipital Lobe – The occipital lobe is located at the back of our brain, and is associated with our visual processing, such as visual recognition, visual attention, spatial analy sis (moving in a 3-D world) and visual perception of body language such as postures, expressions and gestures.
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