Chemistry, 29.01.2022 03:10 brownzackery71
HELP PLZZ i think the answer is either C or D.
Scientists hypothesize Earth’s early atmosphere was a result of outgassing from the interior of the planet. Gravity trapped the gasses (including NH3 and CO2) close to Earth’s surface. Over time, bacteria with the ability to perform photosynthesis changed the composition of the atmosphere. As plants evolved, levels of oxygen continued to increase as the levels of carbon dioxide decreased. The hydrosphere – primarily the ocean – played a major role absorbing carbon dioxide from the atmosphere. As plants grew on Earth’s surface, they weathered the geosphere producing soil. Microorganisms in the soil allowed for the evolution of land plants which also extended the boundaries for early animal populations.
As outgassing and volcanic eruptions created Earth’s early atmosphere, what two spheres directly affected one another?
A) Biosphere and geosphere
B) Hydrosphere and biosphere
C) Geosphere and atmosphere
D) Atmosphere and hydrosphere
Answers: 3
Chemistry, 22.06.2019 05:00
1)each group 16 element has how many valence electrons? ( )4 ( )6 ( )8 ( )16 2)how many dots appear in the dot structure for calcium ion, ca2+? ( )zero ( )one ( )two ( )eight 3) which of the following atoms forms a cation to obtain an octet of outer shell electrons? ( )magnesium ( )oxygen ( )fluorine ( )helium 4) an al3+ ion contains 13 protons and 10 electrons. ( )true ( )false 5) valence and non-valence electrons are represented in lewis dot structures. ( )true ( )false
Answers: 3
Chemistry, 22.06.2019 07:30
Label a-f based on the table using c for concentrated and d for dilute
Answers: 2
HELP PLZZ i think the answer is either C or D.
Scientists hypothesize Earth’s early atmosphere was...
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