Why clinical thermometer has constriction near the bulb

Match the correct terms to their descriptions a system in which only energy but not matter is exchanged frozen water in snow part of geosphere that includes only soil a thin layer between the troposphere and the stratosphere cryosphere tropopause closed system pedosphere

How does a catalyst influence a chemical reaction?

10 15 20 time (minutes) using the graph of data from this experiment, at which point was the light source most likely removed? ob