Which of the following is not a reason for the seasons?
A) the revolution of Earth around the Sun
B) the timing of Earth's perihelion and aphelion
C) Earth's axial tilt
D) the oblate spheroidal shape of Earth
E) the orientation of Earth's axis
B
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When the frequency of a vibrating object is doubled, its period
A. is one-quarter. B. is halved. C. doubles. D. none of the above
A sample of steel is composed of 5% carbon and 95% iron. Which is the solvent?
A. steel B. iron C. carbon D. Steel is not a solution, it is a mixture. E. A solid cannot be a solvent.
Match the fossil with the correct mode of fossilization
A) silica replacement of a tree B) seashell is buried in sediment then dissolved C) replica of the surface of fish in mud D) deer footprints preserved in soft sediment, later turned into rock E) residue of carbon remains of a fossil insect F) hollow spaces that fill with mud or mineral matter G) spider trapped in tree sap 1) permineralization 2) impression 3) amber 4) carbonization 5) mold 6) cast 7) tracks
During times when precipitation exceeds potential evapotranspiration,
A. extra water goes into soil-water recharge if the soil is below field capacity. B. there cannot be a deficit. C. water may go into deep percolation into groundwater. D. All of these.