Which best describes the intrinsic motion of stars?
A) their circular motion across the sky in a 24-hour period
B) their apparent yearly cycle around the Sun, due to Earth's revolution
C) their motion relative to all other bodies
D) their motion relative to Earth
C
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The quantity that best relates to the size of an object is
A. volume. B. mass. C. weight. D. none of the above
Which of the following groups of people is a nation without a state?
A) Estonians B) Azeris C) Turks D) Kazakhs E) Kurds
The Northern Aral Sea has partially recovered due to ____.
A. a dike that blocks the flow out of the Northern Aral Sea B. a restriction on withdrawing any water from the Northern Aral Sea C. rainwater harvesting D. recharging the Sea with groundwater E. increased rainfall in the northern region
As species interactions, clownfish and sea anemones are considered ________ while plants and myccorhizae are considered _________
Fill in the blank(s) with the appropriate word(s).