<span>#1) In each box, write the appropriate type of rock.
Answer:
A: Permian
B: Carboniferous
C: Devonian
D: Silurian
E: Cambrian
Volcanoes released carbon dioxide, water vapour and nitrogen. This gases formed the earth’s early atmosphere. These gases were released from volcanoes.
I hope it helps, Regards.<span>
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1. portable 2. network 3. graphics
The physical feature that can be found throughout the Yucatan Peninsula are Cenotes. These are caves and sinkholes that were used to access the groundwater and for sacrificial offerings by the Maya. These features are natural swimming holes.
<span>A method of processing coal to remove contaminants by mixing coal in a solution of potassium permanganate in a selected concentration range, rinsing the coal, mixing the coal in a solution of ammonia hydroxide in a selected concentration range to cause the solution to be brought into contact with the surfaces and pores of the coal, discharging the processed coal from the second reaction vessel, monitoring the process to detect when the concentration of aqueous ammonia in the second reaction vessel has fallen below the selected range, and feeding aqueous ammonia solution with an ammonia concentration in or above the selected range to the second reaction vessel to return the solution to within the selected range.</span>
