In the classroom during a visual inspection of a rock, a student recorded four statements about the rock. which statement about the rock is an observation?

1)the rock formed deep in the earth's interior
2)the rock cooled rapidly
3)the rock dates from the precambrian era
4)the rock is black and shiny

Ans. : frostbite is when exposure to cold temperatures causes freezing to the skin or other tissues. it most commonly affects the hands, feet, and face. the longer areas are exposed to cold, typically the worse the frostbite. the water temperature used for rewarming a frostbitten part should be : (102 -105) f degrees.

Answerd. may include all of these are many definitions of bases: the  brønsted-lowry definition of acids and bases says that bases are proton acceptors.the arrhenius definition of acids and bases says that bases increase [oh⁻] in solution (thereby producing oh⁻ ions)the lewis definition of acids and bases says that bases donate electron pairs.therefore, the sensible answer is that a base may include all of the described characteristics.

Ibelieve it is b. proton.hope my answer has you : )