Part 1-: Our sun: a) will explode in the next few hundred million years. b) is a
ID: 109761 • Letter: P
Question
Part 1-:
Our sun:
a) will explode in the next few hundred million years.
b) is a giant fusion reactor.
c) was formed from the original “proto-sun”.
d) is about 3 billion years old.
e) both b and c are correct.
Part 2-:
____is a mineral and _____ is a rock
a) limestone, quartz
b) quartz, granite
c) pumice, feldpar
d) coal, granite
e) all of the above are correct
Part 3-:
Rocks composed of calcite are particularly susceptible to which form of chemical weathering?
a) frost wedging
b) hydrolysis
c) dissolution
d) oxidation
e) sheeting
Part 4-:
The Canadian Prairies are dry and temperate. Decomposition rates are low, but deposition of plant material is high. The prairies are dominated by ________ soils which are characterized by an accumulation of _________ in the _______ horizon.
a) glyesolic; mottling; b
b) organic; organic matter; c
c) brunisolic; clay; b
d) chernozemic; organic matter; a
e) solonetzic; salt; a
Explanation / Answer
1) e- becuase sun produces energy due to nuclear fusion of H to form He and orginated from gravitational collpase of a proto star.
2) b- Quarts is a single mineral asseblage formed of siO2 , Granite is a rock formed from quartz, feldspars and mica.
3) c. - Calcite,will dissolve in weak acid, to produce calcium and bicarbonate ions. The equation is as follows:
CaCO3 + H+ + HCO3– —–> Ca2+ + 2HCO3–
4. d.
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