Final answer:
A plastic scoop is preferred for scooping ice because it conducts heat poorly, keeping the ice frozen longer compared to a glass scoop. This is related to the efficient ice bag method of making ice cream, which utilizes plastic's low heat conductivity.
Step-by-step explanation:
A plastic scoop should be used instead of a glass to scoop ice because the plastic scoop is a poor conductor of heat. Materials like glass or metal can more easily transfer warmth from your hand to the ice, which can cause the ice to melt faster. In contrast, plastic does not conduct heat as well, so it helps keep the ice in its frozen state for a longer period when scooping. This principle is similar to why the ice bag method for making ice cream is so efficient; the plastic bag does not absorb energy as much as air in the freezer would, allowing for faster freezing.