Evidence for free oxygen in the atmosphere comes from ____
a. zircon crystals
b. sandstone-carbonate-shale assemblage
c. multicelled organisms
d. continental red beds
e. tillites
d
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Iceland is less cold in winters than countries in nearby Europe at the same latitude due to it
A. being warmed by seawater. B. being an island. C. both of these D. neither of these
Until the late nineteenth century, immigration to the United States was almost totally unrestricted
Indicate whether the statement is true or false.
Freely roaming electrons in a material tend to make it a conductor of electricity. What other property do freely roaming electrons have an effect upon?
A) color B) luster C) cleavage D) density
The most common type of home barometer is called the ____________________ barometer
Fill in the blank with correct word.