Edwin Hubble discovered that the farther away a galaxy is the
A. more black holes it contains.
B. faster it is receding from us.
C. more massive it is.
D. more energetic it is.
Answer: B
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Rayed craters on the Moon, such as Copernicus, formed during an intense, early period of bombardment prior to the formation of the lunar maria
Indicate whether the statement is true or false
How did plant and animal fossils contribute to the theory of continental drift?
What will be an ideal response?
Mineral growth in magmas at the surface with temperatures around 1,000 to 1,200°C occurs in the following way
A. Iron and magnesium will link up with aluminum and the silicon-oxygen tetrahedron as magma temperature decreases to sequentially form four distinct and discontinuous families of minerals-olivine, pyroxene, amphibole, and biotite mica. B. Both of these are correct. C. Calcium will combine with aluminum and the silicon-oxygen tetrahedron to begin forming the plagioclase feldspar family, a continuous and gradational series of minerals. D. None of these choices are correct.
What plan did Europe introduce in 2005 to help the region fight climate change?
A) a program to become the world's leader in solar energy B) an emission trading scheme C) a research program to perfect carbon sequestration D) a tree-planting plan E) a plan to eliminate all usage of fossil fuels by 2020