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 greenhouse effect: heat trapping by earth's atmosphere.
Landmarks in the evolution of life on Earth
Short-wavelength flux is reflected by Earth
Coral bleaching events are becoming more common
Earth’s Spheres