Match the events leading up to the formation of the early Earth in order.
A) Formation of proto-planets.
B) Formation of solar nebula.
C) Contraction of interstellar materials.
D) Nuclear fission lights up Sun.
1) First
2) Second
3) Third
4) Fourth
Question 2
The strong promotion by the Chinese government of villagers to move to cities has produced
A) slowing of urban industrial growth.
B) families with increasing numbers of children.
C) loss of rural traditions and lifestyles.
D) stronger family structures.
The life cycle of the early diverging moss genus, Sphagnum, illustrating reproductive adaptations th
Earth’s history spans 4.5 billion years. Geologists and paleontologists have pieced together the his
Night Attack on the Sanjo Palace (detail), from the Scrolls of Events of the Heiji Period.
Four pieces of evidence that the reticular formation is involved in sleep.
The early onset of spring melting and the gradual diminution of summer snowpack
Formation and Flow of Lymph