The excess of nutrients in aquatic ecosystems
What will be an ideal response?
Eutrophication
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The Roche limit is the point at which
A) the mass of an object classifies it as a moon. B) a moon orbiting a planet experiences synchronous rotation. C) the external tidal forces on an object are strong enough to be felt by the object. D) the external tidal forces on an object become greater than the internal forces that hold it together. E) the internal forces that hold an object together weaken so that the object falls apart.
________'s theories were based on the very accurate observations made by ________
A) Kepler; Tycho Brahe B) Galileo; Kepler C) Kepler; Galileo D) Tycho Brahe; Kepler
The Sun's average surface (photosphere) temperature is about ________
A) 1,000 K B) 5,800 K C) 1,000,000 K D) 37,000 K
If the longest wavelength of light that is able to dislodge electrons from a metal is 373 nm, what is the work function of that metal, in electron-volts? (1 eV = 1.60 × 10-19 J, c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s)
What will be an ideal response?