A beam of light emerges from water into air at an angle bent
A. toward the normal
B. in a direction parallel to the normal.
C. in a direction perpendicular to the normal.
D. away from the normal.
Answer: D
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The formation of protons over neutrons (thus producing about a 7:1 ratio) was favored in the early universe because
A. the positively charged protons were repelled away from the explosion. B. the more massive neutrons made better targets for nucleon collisions. C. it takes more energy to create a neutron from a proton than a proton from a neutron. D. it takes more energy to create a proton from a neutron than a neutron from a proton.
The carbohydrates found in the cell membrane function in
A. cell recognition, the ability to distinguish one type of cell from another. B. controlling the chemical reactions that occur in cells. C. controlling transport in and out of cells. D. none of the above
Physical, chemical, and biological factors contribute to soil formation.
Answer the following statement true (T) or false (F)
A comet's tail ________.
A. points toward the nearest planet as a result of its gravity B. is a vapor trail behind a comet that points in the direction from which the comet came C. lines up with the solar wind moving outward from the Sun D. is composed of smoke from the burning comet E. always points toward the Sun