It is the Pumice. It is a light-hued, greatly permeable molten shake that structures amid dangerous volcanic emissions. It is utilized as total in lightweight cement, as finishing total, and as a rough in an assortment of modern and purchaser items. Numerous examples have a sufficiently high porosity that they can skim on water until the point when they gradually end up noticeably waterlogged.
Answer:
<u>Olivines an Pyroxene, and 5 to 10% of calcium oxides and aluminium oxides</u>.
Explanation:
- The upper mantle of the earth begins just 10 kilometers below the surface of the lithosphere and under the ocean about 35 km and ends to the lower mantel at 670 km.
- Here the temperature range from 200 to 900 degrees celsius, at the boundary is composed of 55% of olivines and 35% of pyroxenes, minerals such as garnet and spinal are also found.
- Lehmann discontinuity is which is an abrupt change caused by the p and s waves occurs at the depth of 220 km. In the upper mantel and lower crust, there exists a discontinuity called the Gutenberg discontinuity.
- Mantel forms the rigid liquid sphere on which the slabs move.
False. It was used to protect the eastern border of France.
Answer is: <span>geologic processes we see today were also at work in the past.
</span>Theory of uniformitarianism interprets that change comes gradually (events appear at the same rate now as they have always done).
William Whewell (1794 –1866), English<span> </span><span>scientist,</span> coined word uniformitarianism.
Answer:
Sun - 28%
Jupiter - 12%
Removing helium fro Jupiter's atmosphere - Impractical
Explanation:
The Sun is a giant star while Jupiter is a planet. The Sun shines by converting hydrogen into helium by nuclear fusion, whereas, the helium found on the atmosphere of Jupiter are the remnants from the big bang. For Jupiter to be even considered a star, it has to expand roughly 10 times its width.
Removing the helium from Jupiter's atmosphere is impractical because of a lot of factors which includes but not limited to; distance, surface temperature, escape velocity.