Which of the following best summarizes current understanding of other extinctions in Earth's past history?
What will be an ideal response?
There have been a few other fairly sudden mass extinctions, but none are as clearly tied to impacts as the dinosaur extinction
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The Solar and Heliospheric Observatory (SOHO) is positioned:
A) in a geosynchronous orbit around the Earth. B) in near-Earth orbit. C) about 1.5 million kilometers from Earth at the L1 Lagrangian Point. D) on the far side of the Sun at the L3 Langrangian Point. E) on the far side of the Moon.
If you see Polaris directly overhead, you must be very close to
A) the equator. B) the South Pole. C) the Tropic of Cancer. D) the North Pole.
What causes the jet streams to form?
A) pressure gradients B) temperature gradients C) pressure and temperature gradients D) none of the above
If a certain sample of an ideal gas has a temperature of 109°C and exerts a pressure of 1.2 x 104 Pa on the walls of its container,
how many gas molecules are present in each cubic centimeter of volume? The ideal gas constant is 8.314 J/mol • K and Avogadro's number is 6.022 × 1023 molecules/mol.