A sample prepared using the solvent and any other chemicals in the sample solutions, but not the absorbing substance A measurement of the amount of light taken in by a sample A unit commonly used in spectrophotometry that is inversely proportional to energy and commonly measured in nanometers A square-shaped container, typically made of quartz, designed to hold samples in a spectrophotometer

Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? a. the balloons both rise. the cold balloon is larger than the warm balloon. b. the balloons rise at the same rate. both balloons are the same size. c. the warm balloon expands and rises. the cold balloon shrinks and sinks. d. the cold balloon expands and rises. the warm balloon shrinks and sinks.