Part a
record the gas concentrations associated with each of these time periods.
(note: ppm = parts per million)
b iv x font sizes - a - a - e eje e 3 no
period
n30 % relative
humidity
co2 (ppm)
cha (ppm)
today
1750
ice age

the answer is the first option

explanation:

just googled it m8. not that hard

lol

answer is: naturally occurring solid, inorganic compound or element is mineral.

minerals usually have crystalline form, that means than crystal constituents (atoms, molecules or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions.

for example magnetite is a mineral of iron oxide (fe₂o₃).

calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (caco₃).

dolomite is an   carbonate mineral composed of calcium magnesium carbonate (camg(co₃)₂).