When a rat's blood sugar level decreases, the hypothalamus releases the hunger-triggering hormone .

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.

To sciences do not agree on which type of grocery bag is better for the environment what is most likely to come out come out of the disagreement

How energy flows through each level in this energy pyramid. is all the matter and energy from one level transferred to the next level?