The Choices Below Describe Four Hypothetical Planets

question 71

Multiple Choice

The choices below describe four hypothetical planets. Which one would you expect to have the most features of erosion? (Assume the planets orbit a star just like the Sun and that they are all the same age as the planets in our solar system.)

• A)Size: same as Venus. Distance from Sun: same as Mars. Rotation rate: once every 25 hours.
• B)Size: twice as big as Earth. Distance from Sun: same as Mercury. Rotation rate: once every 6 months.
• C)Size: same as Mars. Distance from Sun: same as Earth. Rotation rate: once every 18 hours.
• D)Size: same as the Moon. Distance from Sun: same as Mars. Rotation rate: once every 10 days.

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Definitions:

Independent Variable

In an experiment, it is the variable that is controlled or changed to test its effects on the dependent variable.

Chocolate

A sweet, typically brown food preparation of roasted and ground cacao seeds, often sweetened and consumed as confectionery.

Medical Placebos

Substances with no therapeutic effect that are used in clinical trials to compare the effects of actual drugs on patients' health conditions.

Active Ingredients

The components in a substance that are responsible for its therapeutic effects.