<span>One observation would be the physical size of Russia compared to other countries, despite a lack of visible borders from space. In addition, part of Russia's outline would likely be obscured by the various clouds and objects in the stratosphere; this would allow the astronaut to view potential cloud and weather patterns on earth. Also, an astronaut could see outlines of Russia's geography such as mountain ranges.</span>
Many living organisms respond to things in the environment called Stimuli.
Answer:
Unconditioned stimulus.
Explanation:
Classical conditioning may be defined as a type of learning procedure in which the biological procedure is used to pair up with the previous nerve stimulus. This stimulus result in the response of an individual.
The Pavlov experiment with the dog explains the process of classical conditioning. The ringing of bell (conditioned stimulus) is paired with unconditioned stimulus (meat presentation).
Thus, the meat presentation is unconditioned stimulus.
The following events are provided;
A.The height of the civil rights struggle in the United States
B.The Civil War
C.The Great Depression
D.The first appearances by the Fisk Jubilee Singers
The answer is; B, A, D, C
- America civil war occurred in 1861
- The height of the civil rights struggle in the United States was in the 1870s
- The Great Depression occurred in 1929
- The first appearances by the Fisk Jubilee Singers were in 1871