context1: 55% to 64% <strong>water</strong> which comes from the milk or other ingredients.</poem> These compositions are percentage by weight. Since <strong>ice</strong> cream can contain as much as half air by volume, these numbers may be reduced by as much as half if cited by volume. In terms of dietary considerations, however, the percentages by weight are more relevant.
context2: It has the benefits of proximity to Earth and lower escape velocity, allowing for easier exchange of goods and services. A drawback of the Moon is its low abundance of volatiles necessary for life such as hydrogen, nitrogen, and carbon. <strong>Water</strong> <strong>ice</strong> deposits that exist in some polar craters could serve as a source for these elements.