Why are older rocks more likely to be found on the continents than on the ocean floor?
What will be an ideal response?
Answer: Mid-ocean rifts are places of rock formation—new rock; and subduction zones are places where oceanic crust is pulled downward to be recycled. Continental crust is too buoyant for subduction to occur, so on the continents older can be found
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A portion or all of the same zodiac constellations can be seen by those in either hemisphere year round
a. True b. False Indicate whether the statement is true or false
In addition to visible light, Hubble can do some work in the infrared and ultraviolet portions of the spectrum
Indicate whether the statement is true or false
The whiteness of clouds, unlike the blueness of the sky, primarily involves
A) medium sized particles. B) reflection and refraction of sunlight. C) seeds upon which condensation of cloud material forms. D) water prisms.
Which of these waves will diffract the most when passing through a 20 cm wide opening in a barrier?
a. a wave with a wavelength of 25 cm b. a wave with a wavelength of 2 cm c. a wave with a wavelength of 0.05 cm d. none of these waves will diffract at all