Scientific investigations can be limited in different ways. For each limitation described, select the type of investigation it is associated with. The investigation that makes it hard to control variables is .
The investigation that may or may not demonstrate cause and effect is .
The investigation that can be impractical is .
The investigation whose results may change over time is

__1__ is a climate cycle where the temperature of the __2__ ocean changes because of movements of air and ocean currents. during this period, the trade winds in the south __3__ , causing the __4__ water to move from the __5__ region to the __6__ region. 1) el nino or the monsoon 2) atlantic, indian, or pacific 3) reverse, strengthen, or weaken 4) cold or warm 5) eastern or western 6) eastern or western

What are some characteristics of a free enterprise economy?

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