What happened during the accretion phase of the early solar system?
A) Atoms and molecules in the gas bonded together and solidified.
B) Particles grew by colliding and sticking together.
C) The solar nebula differentiated into metals inside of the frost line and ices beyond.
D) Large planetesimals captured atmospheres from the solar nebula.
E) Earth gained its oceans from icy planetesimal capture.
Question 2
Which statement about Pluto's discovery is FALSE?
A) It was predicted by Percival Lowell, based on perturbation theory.
B) It was discovered by Clyde Tombaugh close to Lowell's predicted position.
C) It was found in 1930, the first planet found by an American.
D) It was the massive jovian Lowell described as Planet X in his calculations.
E) Cold and dark, it was named for the god of the underworld.
Selected Central Nervous System Neurotransmitters and Their Functions
The major divisions of the nervous system.
Relaxed and supercoiled DNA molecules
The Human Olfactory System
Respiratory system
system equation