The power goes out and the only light source you have available is a chemical glow stick. As you sit in the dark with this tiny light source you think
about your lesson on endothermic and exothermic reactions. Do you think
this reaction would be classified as an endothermic or an exothermic reaction?
Be sure to state your evidence and reasoning for your answer.

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