Pretty sure it was Galileo
I assume you meant which method is least reliable for identification.
If so, the answer would be COLOR, since there are many minerals that are different, yet share similar color. So it wouldn't be reliable to identify a mineral based off it's color.
Farmers underwatering crops
Answer:
<u>Radiation</u>
Explanation:
Radiation is a process by which the heat energy is exchanged between the surface of earth and the atmosphere and space. This causes reflecting of light from the glaciers top as white light gives back more reflectance and similariar raises the temperature of the glaciers thus at the summit glaciers are warm.