Shellie takes college courses that interest her and enjoys learning for its own sake; Tori takes courses in which she is fairly certain she'll do well and studies mainly to ensure good grades. In psychological terms, Shellie is motivated; Tori is motivated.

intrinsically; extrinsically                                                                            

Explanation:

Intrinsic motivation: In psychology, the term "intrinsic motivation" is described as an individual's behavior that is being driven by different "internal rewards" i.e, a form of motivation in which an individual is being engaged in behaviors that come from within him or her as it was naturally satisfying him or her.

Extrinsic motivation: In psychology, the term "extrinsic motivation" is described as an individual's behavior that is being driven by some external rewards, for example, praise, money, grades, etc and generally comes from outside the person.

the earthquake in haiti was a magnitude of 7.0 according to the u.s geological survey yet the smaller earthquake in haiti killed more than 200,000 and left more than 1.2 million people homeless. the chile earthquake was a magnitude of 8.8 and 500 times more stronger but chile's earthquake only injured 712 people.