a. When Earth receives energy from the Sun, some energy is reflected back into space b. some is absorbed by the atmosphere some is absorbed by land and water on Earth's surface d. all of the above. Please select the best answer from the choices provided Ο Α רם ОС OD​

Which element is found in both dna and proteins

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.

How far down have geologists drilled holes ? (science) a: 3.8 km b: 12 km c: 100 m d: 1200 km