Why is erosion more effective on Earth than on Venus or Mars?
What will be an ideal response?
Erosion on Earth arises primarily from processes involving water, but also from atmospheric winds. Venus has very little surface wind because of its slow rotation, and wind on Mars does little damage because of the low atmospheric pressure. On Earth, water contributes to erosion through processes such as rain and rivers breaking down mountains, carving canyons, and transporting sand and silt. Water also seeps into cracks and breaks them down from the inside.
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A term for electric pressure is
A) current. B) voltage. C) electric resistance.
An electric motor on an airplane operates on 24 volts and draws a current of 15 amperes. (a) What is the power consumption of the motor? (b) How much energy does the motor use during a 2 hour flight?
Four of the five answers listed below possess electrons in the third energy level. Select the exception
a. sodium (11) b. magnesium (12) c. chlorine (17) d. neon (10) e. argon (18)
The cosmological principle calls for the distribution of galaxies to be homogeneous. On the large scale, is this true?
What will be an ideal response?