Which describes an ice age? a. the time when woolly mammoths and other extinct animals walked earths surface. b. the periodic freezing of the oceans, occurring once every 100,000 years. c. cold periods in earths history during which glaciers covered much of the surface. d. a year of cooler than usual summer months.

True or false, the three major scales used to measure earthquakes are mercalli scale, richter scale and magnitude scale

1) in saturated limewater, [h+ ]=3.98x10-13 m. a) find [oh]-/ b) what is the ph? / c) is the solution acidic, basic, or neutral? / 2) in butter, [h+ ]=6.0x10-7 m. a) find [oh]-/ b) what is the ph? / c) is the solution acidic, basic, or neutral? / 3) in peaches, [oh]=3.16x10-11 m a) find [h+ ]/ b) what is the ph? / c) is the solution acidic, basic, or neutral? / 4) during the course of the day, human saliva varies between being acidic and basic. if [oh]=3.16x10-8 m, a) find [h+ ]/ b) what is the ph? / c) is the solution acidic, basic, or neutral? /

Geothermal energy for industrial use is available almost anywhere. a.true b.false