Question

1. which choice completes the text so that it conforms to the conventions of standard english? most of the ice found on earth is ice ih, distinguished by a crystalline structure in which molecules form a hexagonal pattern. amorphous ice, on the other hand, consists most of the ice in the ultracold environment of outer space. defined by a disorganized molecular structure, -- a. ice ih differs from amorphous ice in that it possesses the thermal energy to form crystals. b. ice ih contains crystals, whereas amorphous ice, which lacks the thermal energy to form them, does not. c. the lack of thermal energy in amorphous ice explains its inability to form the crystals found in ice ih. d. amorphous ice lacks the thermal energy to form the crystals found in ice ih.

Explanation:

The text describes the difference between ice Ih (crystalline) and amorphous ice in terms of thermal - energy and crystal - forming ability. Ice Ih has the thermal energy to form crystals while amorphous ice lacks it. Option B correctly states that ice Ih contains crystals and amorphous ice lacks the thermal energy to form them.

Answer:

B. Ice Ih contains crystals, whereas amorphous ice, which lacks the thermal energy to form them, does not.