Why is a well-insulated building comfortable in both cold and hot weather? the insulation keeps the cold in during the summer and the cold out in the winter. the insulation becomes a good conductor in the cold weather. the insulation becomes a good conductor in the hot weather. the insulation keeps the heat in during the winter and the heat out in the summer.

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 2 options: 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 cold balloon expands and rises. the warm balloon shrinks and sinks. the warm balloon expands and rises. the cold balloon shrinks and sinks.