What do we mean when we say that the rotation curve for the milky way galaxy is "flat"?

How did Ghana become rich?

Botswana's major mineral export at this time is a. silver. b. gold. c. coal. d. diamond.

Which best describes why subsistence farming was forced to evolve in the late 20th century? A. Increasingly extreme weather disrupted production. B. Output per person failed to increase. C. Yields were unable to meet demand. D.

The position of the new moon is always located in the day time sky True or False

SPOIL What evidence supports sea-floor spreading at the mid-ocean ridge? land & plant fossils found across oceans land looks like puzzle pieces & glacier till in warm climates matching magnetic strips & rock ages on both sides similar rock

What is often a difference between the hearths of folk culture and those of popular culture

Why did the Mongols launch the deadly attack on Nishapur

Which latin American country is the only nation ever created as a result of a revolt by enslaved people? A. Brazil B. Chile C. Haiti D. Aragentina

Where did the big bang occur? where did the big bang occur? near the center of the milky way galaxy. near the andromeda galaxy. several billion light-years away. near the earth. throughout all space?

Convection currents in the plastic mantle are believed to cause divergence of lithospheric plates at the