What is acid rain? What chemicals make rain acidic, and how does it happen? Acid rain is a rain or any other form of precipitation that is unusually acidic, meaning that it has elevated levels of hydrogen ions.

Any sound above what db can cause hearing loss in human beings

Plant species a has a diploid number of 12. plant species b has a diploid number of 16. a new species, c, arises as an allopolyploid from a and b. the diploid number for species c would probably be a) 12. b) 14. c) 16. d) 28. e) 56.

Which u.s. state lists the horned toad as its state reptile?