a geologist is examining a new sample of rock. she is trying to categorize it based on its physical properties. which of the following characteristics cannot be identified based on her basic visual and tactile assessment?

melting temperature
color
striations
texture

Color, striations and texture are all things that could be identified using basic visual and tactile assessment. So, the answer has to be A.melting temperature.

The open ocean begins at the low-tide mark and extends to the end of the continental shelf

above statement is not a true statement about the open ocean because the open ocean has low levels of nutrients. most of the photosynthetic activity on earth occurs in the open ocean within the photic zone. organisms in the deep ocean are exposed to frigid temperatures and total darkness but it does not begin at the low-tide mark.

Your answer is water because there is combined mass of water found on, under, and over the surface of a planet. your answer is water.