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What was Edwin Hubble's important contribution to understanding the evolution of theUniverse?All the baryonic matter (the matter which can form into atomic nuclei) was formed in the ?rstfew seconds following the “Big Bang”
The Earth’s mantle extends almost halfway to the centre of our planet. It is:●Entirely composed of MgSiO3 in the mineral structure of perovskite93% of the chemical elements that comprise the Earth could be modelled by the mineral olivinewith a 1:1 magnesium-iron ratio. What is the Mg:Fe ratio of the olivine xenoliths that arebrought to the surface in basaltic lava 틃ows?Which of these simple models best describes Earth’s interior structure?Choose the list that shows rock composition decreasing in silica and increasing in iron andmagnesium.
Which of the following is caused by the interaction of the solar wind with magnetic lines offorce and gases in polar regions?Roughly 50% of Earth’s surface is covered by oceans and seas.Iron, Oxygen, Silicon, and Potassium make up most of the mass of the whole Earth