A Meteor Shower Is Produced When

question 9

Multiple Choice

A meteor shower is produced when

• A)a large number of sporadic meteors are observed.
• B)Earth passes through the asteroid belt.
• C)massive particles are carried outward from the Sun by the solar wind and enter Earth's atmosphere.
• D)Earth passes through the orbital path of a comet.
• E)meteors cause condensation in the upper atmosphere that leads to early morning rains.

---

Definitions:

Hawthorne Effect

The effect that researchers themselves may have on an experimental group. The effect is named after an organizational study in which employees were found to be responding to the perceived interest of management rather than to the experimental condition itself.

External Validity

The extent to which the results of a study can be generalized to other situations, populations, or time periods beyond the study itself.

Diffusion

In experimental design, the problem of a treatment effect spreading from group to group as people communicate.

Treatment Effect

The difference in outcomes between a group receiving an intervention and a control group in an experimental study.