What does the theory of continental drift state?* O Continents are stationary and do not move
O The Earth is broken into lithospheric plates that move due to convection currents
C
none of the above
O The continents were once joined in a super-continent and have moved over time

Which of the following is a way that advancements in technology improve humans' ability to measure air quality and protect human health?

Which of the following events did not occur as a result of china’s open-door policy? a. trade between japan and china was encouraged. b. all countries were given equal access to chinese ports. c. foreign influence in china increased. d. the influence of the communist party weakened.

Extensive and unusual cold snaps have occurred here recently. is this evidence that global warming is lessening or not occurring? no—although the long-term trend is for warming, short-term weather patterns can still be variable. no—melting of glaciers and ice caps is making the oceans cooler, which can cause cold snaps. yes-- if global warming really were occurring, cold snaps wouldn’t happen. yes—due to global warming, weather patterns should be become less—not more—variable.