Silica definition
What will be an ideal response?
Dioxide form of silicon which occurs in sand and other minerals
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Because the changes in energy levels happen in discrete steps, we refer to these as ________ leaps
Fill in the blank(s) with correct word
What is the Fermi Paradox?
A) Galactic civilizations, like ours, seem forbidden by the laws of physics. B) Interstellar travel is possible yet would take an infinite amount of time because of relativistic time-dilation. C) Reasonable assumptions predict that a galactic civilization should have already arisen in the Milky Way. Yet, we have absolutely no evidence for it. D) The Drake equation predicts that there should be no intelligent life in the Milky Way. Yet, we exist. E) We would be unable to detect an Earth-like planet even at a distance of a few light years.
What is the solar wind?
A) a stream of charged particles flowing outward from the surface of the Sun B) the uppermost layer of the Sun, which lies just above the corona C) the strong wind that blows sunspots around on the surface of the Sun D) the wind that causes huge arcs of gas to rise above the Sun's surface
On his honeymoon, James Joule attempted to explore the relationships between various forms of energy by measuring the rise of temperature of water which had fallen down a waterfall on Mount Blanc
What maximum temperature rise would one expect for a waterfall with a vertical drop of 20 m? The specific heat of water is 4186 J/kg ? K. A) 0.047 C° B) 0.064 C° C) 0.053 C° D) 0.071 C°