One line of evidence supporting the Big Bang is the expansion of the universe. Explain how we know the universe is
expanding and how it helps us determine an age for the universe. What will be an ideal response?
Edwin Hubble first realized the universe was expanding. He concluded all galaxies were
moving away from Earth by observing a red-shift in their spectral lines. Additionally, the
farther away a galaxy was from Earth, the faster it was moving away. Knowing the expansion
rate allows scientists to calculate at what point all matter was together. They have concluded
it was approximately 14 billion years ago.
You might also like to view...
Using Map T-3, determine the gradients of the two first-order streams labeled “a” and “b” on the map above, the second-order stream labeled “c” on the map above, as well as Eds Creek after it has become a third-order stream. Determine stream length to the nearest 0.1 mile (take your measurements from Map T-3, not the small map above) using the graphic scale provided.
The following questions are based on Map T-3, the “Deer Peak, Montana” quadrangle (scale 1:24,000; contour interval 40 feet), and Figure 39-3, a stereogram of the same area showing the drainage basin of Eds Creek (46°54'26"N, 114°31'02"W).
Define and discuss the following terms involving radiation: electric wave, magnetic wave, wavelength, wave amplitude, wave speed, black body, Stefan-Boltzmann law, Wien's law, electromagnetic bands
What will be an ideal response?
Where and when did the first department stores open?
A) London in 1815 B) New York City in the 1850s C) Tokyo (then Edo) in the early 1800s D) Paris in the 1830s E) Constantinople in the 1780s
Judge the following sentence according to the criteria given below: A tidal bulge is not created on the side of Earth facing away from the Moon BECAUSE the provided gravitational force is greater than the required centripetal force
A) The assertion and the reason are both correct, and the reason is valid. B) The assertion and the reason are both correct, but the reason is invalid. C) The assertion is correct, but the reason is incorrect. D) The assertion is incorrect, but the reason is correct. E) Both the assertion and the reason are incorrect.