The answer is; Basalt rock
This type of rock is dark-colored due to the high content of magnesium and iron from the lava that forms it. Extrusive basalt rocks are fine-grained due to the rapid cooling of lava on the earth's surface. The basaltic lava is usually of low viscosity to the low silica content. Therefore , this lava flows greater distances before cooling. Basalt comprises approximately 90% of volcanic rocks on earth.
Answer:
Actually, in physical cosmology, Big Bang nucleosynthesis (or primordial nucleosynthesis) refers to the production of nuclei other than H-1, the normal, light hydrogen, during the early phases of the universe, shortly after the Big Bang. About first millisecond, the universe had cooled to a few trillion kelvins (1012 K) and quarks finally had the opportunity to bind together into free protons and neutrons. Free neutrons are unstable with a half-life of about ten minutes (614.8 s) and formed in much smaller numbers. The abundance ratio was about seven protons for every neutron. Before one neutron half-life passed nearly every neutron had paired up with a proton, and nearly every one of these pairs had paired up to form helium. By this time the universe had cooled to a few billion kelvins (109 K) and the rate of nucleosynthesis had slowed down significantly.
Explanation:
Answer:
its d cause
Explanation:
Correlative Conjunctions are pairs of words used to connect two parts of a sentence with equal value.
Answer:
D. carbon dioxide
Explanation:
An increase of a plant's biomass is the result of photosynthesis. Therefore, carbon dioxide and water ultimately contribute to the huge increase in the pine tree's biomass.
(From USATestprep)
Answer: A
Explanation:
Our universe was born from the Big Bang about 13.5 billion years ago. ... Our solar system began forming about 4.6 billion years ago within a concentration of interstellar dust and hydrogen gas called a molecular cloud. The cloud contracted under its own gravity and our proto-Sun formed in the hot dense center.