When you think of a hero, which qualities come to mind? Select all that apply.
shows extraordinary bravery
helps others in times of need
puts the needs of others first
can be trusted to do the right thing
is caring and kind

Some gamma ray bursts are hypothesized to come from mergers of neutron stars or black holes. if this hypothesis is correct, what else should we in principle be able to detect from such mergers? a. gravitiational waves b. x-ray bursts c. significant disruption of gas thousands of light-years away in the surrounding galaxy d. an "afterglow" of bright visible light, lasting for weeks

What is the climate of the himalayas? a. cold and wet c. cold and dry b. hot and humid d. hot and dry

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