Ok, so, I have not read the lesson of course but this is an interesting middle school question. Maybe find a common pattern of angles and mention the most observed degrees of the angles (90 degrees, 60 degrees angels, ect.) I hope I can help in any way!
C. The inner core is known to be made mostly of nickel and iron. However, since there is an outer core (which is the original one that's made out of nickel and iron), your answer might be D. But if you put it the 'core' in general, the right answer should be C.
Reference maps show a variety of basic info on one map.
Ex: Road map or tourist map.
Thematic maps usually highlight only one kind of info on one particular topic.
Ex: Weather map or population map.
Oil shale<span> is a type of </span>sedimentary rock<span> that is rich in kerogen. </span>Kerogen<span> is a part of rock that breaks down and releases hydrocarbons when heated. </span>Hydrocarbon<span>s are substances made entirely of hydrogen and carbon. </span>Petroleum<span> and </span>natural gas<span> are probably the most familiar hydrocarbons. The hydrocarbons in oil shale can be used as an alternative to petroleum or natural gas.</span>
