Explain why the early Earth did not form with water, and how it gained it later in its formation
What will be an ideal response?
Earth, and all terrestrial planets, formed inside the frost line from rocky and metallic planetesimals. The temperature of the solar nebula was too hot for water ice to exist and Earth was too small to hold onto a substantial atmosphere of hot gases. Earth gained its water later during the heavy bombardment phase when water-rich planetesimals that formed beyond the frost line were scattered into the inner solar system, predominantly through gravitational encounters with Jupiter, and impacted Earth.
You might also like to view...
Ernest Rutherford tested Thomson's model by directing a beam of beta particles, at a thin gold foil
Indicate whether the statement is true or false
The amount of light from an incandescent lamp that is transmitted through an ideal Polaroid filter is half, and through a classroom Polaroid filter is
A) less than half. B) more than half. C) half.
The astronaut's experiment with the hammer and the feather illustrate that:
a. hammers and feathers have the same mass on the Moon. b. hammers and feathers have the same weight on the Moon. c. objects of different size, shape, and mass fall at the same rate in a vacuum. d. the absence of air on the Moon results in different rules of physics. e. there is no gravity on the Moon.
In a typical transmission line, the current I is very small and the voltage V is very large. A unit length of line has resistance R. For a power line that supplies power to 10,000 households, we can conclude that
A. IV = I 2R. B. I = V/R. C. IVI 2R. E. I 2R = 0.