General guidelines for examining evidence in a laboratory make sure that evidence that is collected at a crime scene is admissible in court. Which of the following procedures are part of the best practices and procedures for forensic labs? Select all that apply. wear gloves only when working with biological material
create a proper seal upon completion
document examinations performed
clean workspace
document condition of packaging
open one item of evidence at a time
open the original seal only
wear appropriate PPE

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? question 8 options: the cold balloon expands and rises. the warm balloon shrinks and sinks. the balloons rise at the same rate. both balloons are the same size. the ballons both rise. the cold ballon is larger than the warm balloon. the warm balloon expands and rises. the cold balloon shrinks and sinks.