Every morning at the same time, john went into the den to feed his new tropical fish. after a few weeks, he noticed that the fish swam to the top of the tank when he entered the room. this is an example of

This is an example of classical conditioning.

Explanation:

Classical conditioning is the process by which a live being learns and acquires a certain behavior by association to stimulus.

The unconditioned stimulus pairs with a neutral stimulus and this becomes a conditioned stimulus which triggers a conditioned response, previously unconditioned.

In this case, John has been feeding his fish and now they associate John arriving to them receiving their food, the stimulus. They have learnt to swim to the top of the tank by associating which is an example of classical conditioning.

according to hess's theory, when the magma cooled, it would expand and push the tectonic plates apart. it would push the north and south america plates to the west and eurasia and africa ones to the east. the atlantic ocean would get wider but the coastlines of the masses would stay the same.

harry hammond hess was a geologist and a united states navy officer in the second world war. he is considered to be one of the founding fathers of the theory of plate tectonics. he is known for his theories on sea floor spreading, stating that the movement of the continents was the result of see floor spreading. the continents are attached to the plates and do not move separately. the plates themselves shift and change shape, carrying the continents along.

mali had been a state inside of the ghanaian empire. after ghana fell because of invading forces and internal disputes, mali rose to greatness under the leadership of a legendary king named sundiata, the "lion king." the songhai empire, already weakened by internal political struggles, went into decline.