A student spends 30 minutes walking outside on a day when the air temperature is 20°С. She then spends 30 minutes walking outside on a day when it is 0°C. On the colder day only, she finds herself very tired when she comes back inside. Explain this
observation in detail using your understanding of the concept of homeostasis.

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.