Question

There are approximately 7.5 x 1018 grains of sand on Earth.

There are approximately 7 x 102? atoms in an average human body.
About how many times more atoms are in a human body compared to grains of sand on Earth?

Answer 1

There are approximately 9,333 times more atoms in the average human body compared to the number of grains of sand on Earth.

Step-by-step explanation:

The question asks about the comparison between the approximate number of atoms in a human body and the estimated number of grains of sand on Earth. To determine how many times more atoms there are in the human body compared to grains of sand, we first need to recognize the scientific notation used, which is a way to express very large or very small numbers. There are 7.5 x 1018 grains of sand on Earth, while there are approximately 7 x 1022 atoms in an average human body. Using division, we find the ratio of atoms to grains of sand:

(7 x 1022 atoms) / (7.5 x 1018 grains of sand) = (7/7.5) x 10(22-18) = (0.933...) x 104 = 9,333 times more atoms in the human body than grains of sand on Earth.