Distinguish the differences you would see between intrusive and extrusive igneous rocks formed from the same magma
What will be an ideal response?
The main difference you would see from an intrusive and extrusive igneous rock formed from the same magma would be in the grain size of the minerals. The extrusive rock would have small crystals, some so small that you cannot see them with the naked eye.
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According to most estimates, Earth is approximately
A. 4.6 million years old. B. 4.6 thousand years old. C. 4.6 billion years old. D. 4.6 trillion years old.
Flood hydrographs tend to peak sooner and higher downstream from urbanized areas than prior to
urbanization. Indicate whether the statement is true or false.
The last 50 years of declining productivity of the commercial fish populations off the northeast coast of North America reveal the impact of
A) air pollution on fish populations. B) water pollution from sewage and fertilizers on fish populations. C) global climate change on fish populations. D) overfishing.
Changes in Earth's elliptical orbit around the Sun is called
A) eccentricity. B) obliquity. C) precession. D) inclination.