These surface features from Mars, also found on Earth are

A. valleys.
B. sand dunes.
C. mountain ranges.
D. river channels.


Answer: B

Environmental & Atmospheric Sciences

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When the Ottoman Empire collapsed after World War I, which two countries took over most of its Arab colonies?

A) Britain and France B) Germany and Russia C) Greece and Italy D) Portugal and Spain E) Romania and Yugoslavia

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Which country suffered from genocide in the early twentieth century by the Turks?

A) Azerbaijan B) Armenia C) Georgia D) Nagorno-Karabakh E) South Ossetia

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Which slender, conical speleothem grows from water dripping from the ceiling of a cavern?

What will be an ideal response?

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In the scientific method, a hypothesis is a(n)

a. observation b. measurement c. test d. proposed explanation

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