Assume that the typical American household requires 837 kilowatt hours (kWh) of electricity per month. This equates to 3 × 109 joules. How much methane must be burned to produce the average American household’s total annual electricity consumption? the energy density of methane is 55.63

Which set of characteristics best describes igneous rock? a) largest type of rock, made of organic matter, hardest type of rock b) least abundant type of rock, made of other rocks, made mostly of minerals c) found on all continents, contains wavy bands of stripes, contains fossils d) most abundant type in earth's crust, made of magma/lava, contains no fossils