Mercury Is Very Hard to Observe from Earth Because

question 94

Multiple Choice

Mercury is very hard to observe from Earth because:

• A)it always appears as only half lit from Earth.
• B)it never gets more than 28 degrees from the Sun's glare.
• C)its elliptical orbit causes it to change speed unpredictably.
• D)its barren surface reflects too little sunlight; it is almost invisible always.
• E)its very rugged surface does not allow radar to bounce back to Earth.

---

Definitions:

Galapagos Islands

An archipelago of volcanic islands in the Pacific Ocean, known for their unique ecosystem which influenced Charles Darwin's theory of natural selection.

Mainland

The principal landmass of a country or continent; as opposed to islands or peninsulas.

Arithmetically

Relating to or based on arithmetic, the branch of mathematics dealing with the properties and manipulation of numbers.

Thomas Malthus

An English economist and demographer known for his theory that population growth will always tend to outrun the food supply.