Plinean eruptions a. produce a fountain of basaltic lapilli. b. are effusive and contain gas bubbles. c. are highly explosive and can destroy the original shape of the volcano. d. occur in Hawaii, where successive eruptions build up layers of basalt.

Which of the following insects is a decomposer? a. mosquito. b. caterpillar. c. beetle. d. none of the above.

The us and canadian governments are doing all of the following to combat environmental problems except a. encouraging the use of public transportation b. enacting clean water policies c. requiring emissions testing d. limiting animal populations in some regions

The ethnic conflicts in darfur have led to an attempt to destroy a whole people known as