The mass of a grain of sand is 1.672 × 10^-4 kg. Express this number in standard notation.

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Scientific notation is a way to write very large or very small numbers. This method of notation is useful to scientists when they are writing very large or very small numbers, so they don't have to write so many zeroes! To convert from scientific notation to standard notation, look at the exponent: The value of the exponent tells you how many spaces to move the decimal. Since the value of the exponent in 1.672 × 10^-4 is 4, this tells us we will need to move the decimal 4 spaces. The sign of the exponent tells you which direction we are going. A positive exponent tells us to move the decimal to the right. A negative decimal tells us to move the decimal to the left. Since the sign of the exponent in 1.672 × 10^-4is negative, this means we will be moving the decimal to the left. So, since the exponent is negative and has a value of 4, so we just need to move the decimal 4 places to the left to arrive at the answer, 0.0001672. You may use the examples below as a visual reference for how scientific notation represents numbers. 11ec0fda_98c0_0208_a67f_3116d20ccff4_NR0004_00

The Mass of a Grain of Sand Is 1