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ConcepTest: Magnetic Inclination part of Examples
The diagram below shows the magnetic inclination determined for three lava flows preserved in a cliff. (Assume that Earth's magnetic field was in the same orientation as it is today.) What happened to the ...

ConcepTest: Magnetic Inclination in Lava part of Examples
Two lava flows formed at the same location on a plate, 90 million years apart. The plate migrated 500 km northward in the time between the formation of the first and second lava flows. Scientists sampled rocks from ...

ConcepTest: Changing Magnetic Inclination part of Examples
The location of the magnetic North Pole migrated slowly northward over the last century. Assuming that you live in North America, how did magnetic inclination readings of your city change between 1904 and 2004? a. ...

ConcepTest: Cooling History of Magma #1 part of Examples
The lines shown on the idealized graph below illustrate the cooling histories for the four magmas listed below, i.e., the lines illustrate how magma temperature decreased with time. What rock is best represented by ...

ConcepTest: Igneous Process Identification part of Examples
An ice cube melting in hot tea is analogous to which igneous process? a. fractional crystallization. b. assimilation. c. partial melting. d. intrusion.

ConcepTest: Separation of North America and Europe part of Examples
Between 1900 and 2000, North America increased its distance from Europe by approximately ______. (Assume a constant rate of plate motion. 1 km = 1000 m; 1 m = 100 cm; 1 cm = 10 mm.) a. 20-40 centimeters b. 2-4 ...

ConcepTest: Spreading Rate of Spreading Center part of Examples
Scientists collect rock samples of the oceanic crust from a location that is 10 km from a spreading center. (1 km = 1000 m; 1 m = 100 cm; 1 cm = 10 mm.) The sampled rocks were found to be 200,000 years old. What ...

ConcepTest: Age of Red Sea Crust part of Examples
The floor of the Atlantic Ocean is approximately 20 times wider than the Red Sea basin. Predict the approximate age of the oldest oceanic crust below the Red Sea. a. 500,000 years b. 10 million years c. 50 million ...

ConcepTest: Movement of Volcano part of Examples
A volcano formed over a hot spot in the Pacific Ocean would travel approximately _______ in 1000 years. (Assume a constant rate of plate motion. 1 km = 1000 m; 1 m = 100 cm; 1 cm = 10 mm.) a. 1-2 meters b. 100-200 ...

ConcepTest: Axis of Ridge part of Examples
This is part of a magnetic profile across an oceanic ridge system. The profile shows both positive and negative anomalies. Based on the symmetry of the patterns, where is the axis of the ridge located? a. A b. B c. ...

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