Self registering thermometers: record only the maximum and minimum temperatures they are exposed to record only the minimum temperature they are exposed to record only the average temperature they are exposed to record only the maximum temperature they are exposed

if the thermos has a vacuum innner, then heat through conv currents and conduction are reduced = vacuum flask

luster is not a good characteristic to use by itself because luster is the property of minerals that indicates how much the surface of a mineral reflects light. the luster of a mineral is affected by the brilliance of the light used to observe the mineral surface.

i believe the answer is a hope it and is correct