Which of the following gives the main reason that the sky looks blue?
A. the scattering of sunlight by air molecules
B. the emission of blue light by the atmosphere
C. the absorption of blue light by the air
D. the presence of water vapour
Answer: A
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Gasoline overflow from a car's full metal tank on a hot day is evidence that gasoline expands
A. more than metal. B. less than metal. C. about the same as metal. D. none of the above
On this map of the South Atlantic, which letter is on a site of seafloor spreading?
A) A
B) B
C) C
D) D
How do sedimentary cores from the ocean floor support the concept of seafloor spreading?
What will be an ideal response?
Most meteorites have a(n) _______________, a very thin layer of dark glass formed by heat when it came through Earth’s atmosphere
Fill in the blank with correct word.