Which of the following is TRUE?
A) The Sun produces energy through fusion processes.
B) The Sun is also a planet.
C) The Milky Way is part of our Solar System.
D) The Sun is the largest star in the Milky Way Galaxy.
A
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The number of people over 65 represented as a percentage of the labor force is described as a(n)
A) dependency ratio. B) elderly support ratio. C) K-12 support ratio. D) national retirement ratio. E) demographic transition.
What physically breaks hydrogen bonds between water molecules as ice melts?
-covalent bonds of water molecules -movement of water molecules -mass of water molecules -polarity of water molecules
The three largest pools of the carbon cycle, in order, are ________
A) fertilizers, plants, and the atmosphere B) sedimentary rock, the atmosphere, and plants C) freshwater streams, the atmosphere, and plants D) oceans, sedimentary rock, and respiration E) sedimentary rock, oceans, and fossil fuels
In the Cenozoic, the western margin of North America ____
a. changed from a subduction zone to a transform boundary b. changed from a transform boundary to a subduction zone c. changed from a subduction zone to a passive margin d. changed from a subduction zone to an divergent zone e. remained stable and unchanged