Meteor Add Approximately What Mass to the Earth Each Year

question 67

Multiple Choice

Meteor add approximately what mass to the Earth each year?

• A) a few tons
• B) millions of tons
• C) thousands of tons
• D) tens of thousands of tons

---

Definitions:

Conditioned Stimulus

An initially neutral stimulus that, after being linked with an unconditioned stimulus, starts to produce a conditioned response.

Conditioned Response

A conditioned response is an automatic reaction established by learning to an initially neutral stimulus after being repeatedly paired with an unconditioned stimulus that triggers an automatic response.

Unconditioned Stimulus

A stimulus that naturally and automatically triggers a response without prior learning or conditioning.

Drug Tolerance

The reduced effectiveness of a drug as a result of the repeated use of the drug.