What activates a convection current, starting the flow of a fluid?
a.
cold temperatures at the north pole
b.
heated liquids at the earth’s surface
c.
iron-rich rocks in the mantle
d.
temperature differences in the mantle
this is for science

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

Complete the activity titled "comparative urban environments." every city is shaped by different cultural forces. in one to two paragraphs, contrast the culture of two different cities from this activity: new york and buenos aires. what makes these cities stand apart from each other culturally? what is unique about each city’s attitude, language, habits, foods, or architecture?

About 140,000 japanese died in this japanese city when americans dropped an atomic bob at the end of world war ii