Earth's core is hot, dense, and mostly composed of iron and nickel
a. True
b. False
Indicate whether the statement is true or false
True
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A blend of colors in sunlight’s spectrum
A. Prism or A Diffraction Grating |
B. Annie Jump Cannon |
C. Temperature |
D. Spectroheliometer |
E. Continuous Spectrum |
F. Joseph Van Fraunhofer |
While Voyagers were probes that flew past in a few days, Galileo and Cassini are orbiters, designed to study Jupiter and Saturn over prolonged periods of time
Indicate whether the statement is true or false
Which of the following agrees with a no-center, no-edge Universe?
a. a flat geometry b. a positive-curved geometry c. a negative-curved geometry d. All of the other choices are correct.
____ occurs when most of the material collapsing to form a protostar has fallen into a disk around the star and a strong wind from the warm protostar ejects material from its poles
a. An emission nebula b. Hydrostatic equilibrium c. The proton-proton chain d. The thermonuclear fusion of hydrogen e. A bipolar outflow