Drag the tiles to the boxes to form correct pairs. Use the Hertzsprung-Russell diagram to determine which condition describes each star. Use the arrows to help you locate the stars.

Tiles:
- Procyon B
- Polaris
- Vega

Boxes:
- It is fusing hydrogen at its core.
- It has lost its outer shell and retained only a hot core that is slowly losing its brightness.
- Its temperature has decreased, but it is shining brighter than before.

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.