(image is in picture) Which statement best describes what Earth’s outer layer is like underneath the surface in the image?
A. Underneath the soil, Earth's outer layer is made of water.

B. Underneath the soil, Earth’s outer layer is made of hard, solid rock. Underneath the ocean, Earth’s outer layer is made of sand.

C. Underneath both the soil and the ocean, Earth's outer layer is made of hard, solid rock.

D. Underneath both the soil and the ocean, Earth's outer layer is made of sand and water.

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.

This is an active transport mechanism by which cells pump sodium and potassium ions against the concentration gradient

Has magnification ability of hundreds of thousands of times