Answer: stimulus
The students reaction is explained by the theory of classical conditioning first coined by Ivan Pavlov. The students are conditioned to associate the doer closing with the pop quiz and respond accordingly. Pavlov used dogs and their response to ringing a bell every time their food was served, after a some conditioning the dogs would salivate at the sound of the bell regardless of whether or not food was present. The bell was the stimulus.
Chemical: can burn
physical: hard
Answer:
the Union of Soviet Socialist Republics
Explanation: In 1922, Russia along with countries under its control formed the Union of Soviet Socialist Republics (the USSR) better known as the Soviet Union (or the Soviets). It was a communist group and did not agree with western, capitalist countries or their way of ruling.
Answer: Vladimir Putin
Answer: wait explain it in different words is this a question for school for school or something
Explanation:
