Which statement about metamorphic and sedimentary rocks is true? both types of rocks form under high temperature, but sedimentary rocks also require high heat. only metamorphic rocks show signs of rock layers. both types of rocks form under high pressure, but metamorphic rocks also require high heat. both types of rocks result from the cooling of magma. either type of rock can be classified as intrusive or extrusive.

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.