The ammonoids are excellent guide fossils because of distinctive physical features, a short life
span, and a wide geographic distribution. Indicate whether the statement is true or false.
T
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Jet streams are associated with fronts because of the:
A) large temperature gradient. B) clouds forming there. C) higher pressure behind the front. D) reduced friction above the front.
How does a glacier move and where does the movement take place? How quickly do glaciers move?
What will be an ideal response?
One meter equals 3.281 feet, so 4 meters = _________________ feet
Fill in the blank(s) with the appropriate word(s).
Which of the following is not an accurate statement about the melting process in the earth's interior?
A) Melting of rocks is incomplete with partial melts extracted as magma and solid residues left behind.
B) Upwelling flow in the earth's interior brings higher temperature rocks toward the surface and contributes to decompression melting.
C) The earth's lower mantle is entirely molten and heat from this zone produces partial melting in the upper mantle, which produces the diverse volcanic rocks we see at the earth's surface.
D) Water dramatically lowers the melting temperature of silicate rocks, and addition of water commonly contributes to production of magma.