Identify the first step in preparing a spectrophotometer for use.

Why is an elements atomic mass not listed as a whole number on the periodic table

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

How does climate change cause the ocean's thermohaline current to slow down?