Jorge is sitting on a couch. Gravity exerts a downward force on him. Based on Newton's law of action-reaction, the other force acting on Jorge is the – * A) downward force of the floor.
B) downward force of air pressure.
C) upward force of momentum.
D) upward force of the couch.

How did planetesmals form planets? a. they broke apart into smaller chunks. b. they collided and stuck together. c. they cooled and pulled ice together. d. they began to rotate.

Melting and boiling are endothermic processes. this means that these processes absorb energy from their surroundings in order to occur. use this information and the data you collected in the phase change gizmo to describe what happens to the temperature of water when you boil it, then explain why this result occurs.

The variability in marine salinity between habitats does not impact the fish living there. select the best answer from the choices provided t f