Up until the 19th Century, what was the most advanced form of transportation?
A) canals
B) horse-carts
C) ox-carts
D) foot travel
E) dirt roads
A
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What is the ultimate source for naturally occurring carbon-14?
A) Cosmic ray collisions and neutron capture involving nitrogen B) Dissolution of carbonate rocks C) Decay of unstable parent isotopes to create a stable carbon-14 D) Volcanic eruption and emission of greenhouse gases
What type of volcanic eruption is probably shown in this photograph?
A) Fire fountain
B) Basaltic lava flow
C) Felsic lava flow
D) Caldera eruption
A(n) ________ is a volcanic mountain, built up from the seafloor that never reached the sea surface
Fill in the blank(s) with correct word
Water and water vapor is entered Earth's early atmosphere through outgassing and eventually led to the formation of the Earth's ponds, lakes, seas, and, eventually, oceans
Indicate whether the statement is true or false