What units are used when describing the length of time that the universe has been expanding? [check all that apply] [a is not the only answer]

billions of years
millions of years
light years
light year kilometers
decades

Which of the following statements about geographers' perceptions and perspectives is false? a. geographers avoid looking at the world with different perspectives. b. regions are a relative thing and a matter of perception. c. spatial distribution can be a matter of perception. d. mental maps are a way that people memorize and perceive the world around them. select the best answer from the choices provided. a b c d

Based on the information in the graph, what can you conclude about humans in the world in general?

Which type of seismic waves are confined at the surface