Describe how Fred Vine and D. H. Matthews related the seafloor-spreading hypothesis to magnetic reversals
What will be an ideal response?
After researchers discovered alternating stripes of high- and low-intensity magnetism, Vine and Matthews suggested that the stripes of high-intensity magnetism are regions where the paleomagnetism of the ocean crust exhibits normal polarity, while low-intensity magnetism is due to reversed polarity. They reasoned that as magma solidifies along narrow rifts at an oceanic ridge, it is magnetized with the polarity of the existing magnetic field, and because of seafloor spreading, these strips are carried away in opposite directions.
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Transcription occurs in the ________ of a cell, and translation occurs in the ________ of a cell
A) nucleus; cytoplasm B) nucleus; nucleus C) cytoplasm; nucleus D) cytoplasm; cytoplasm
Extinct marine crustaceans like this fossil Trilobite provide evidence in support of
1.the origin of life occurring in the ocean.
2.speciation, or change over time.
3.life existing on Europa.
4.plate tectonics.
The types of marine deltas that are recognized, based on the relative importance of the processes involved in their formation are ____________________-dominated, ____________________-dominated, and ____________________-dominated
Fill in the blank(s) with correct word
This method of soil cultivation reduces soil erosion and runoff
A) swidden farming B) multi-cropping C) short fallow D) conservation tillage E) truck farming