What processes were occurring when this photograph was taken or at some time in the recent past?
A. nuclear fusion, gravitational attraction of material, and movement and rotation of a galaxy
B. attraction of mass by gravity, formation of stars via nuclear fusion, and emission of electromagnetic radiation
C. nuclear fusion and nucleosynthesis of helium, convection in the interior, emission of electromagnetic radiation and heat
D. ejection of the outer envelope of gas and plasma
Answer: B
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A third of the word's population lives in East Asia
Indicate whether the statement is true or false.
Which combination holds true in a partially mixed estuary?
A. Evaporation - precipitation + runoff = transport in B. Evaporation - precipitation + runoff = transport in and Evaporation - precipitation + runoff = transport in - transport out C. Transport in - evaporation + precipitation + river runoff = transport out D. Evaporation - precipitation + runoff = transport in - transport out and Transport in - evaporation + precipitation + river runoff = transport out E. Evaporation - precipitation + runoff = transport in - transport out
On a global scale, generalizations, simplifications, and compromises are necessary in order to distinguish between climate types and regions in a classification system
Indicate whether the statement is true or false
How has sea level changed over the last few thousand years?
A) It has risen 1 cm per millennium. B) It has remain constant. C) It has fallen 25 cm per century. D) It has risen about 10 cm per century.