Question

8. The mass and density of the moon and Earth. The earth’s mean radius is 6371 km and its mass is 6.0 x 10²⁴ kg. The moon’s mean radius is 1738 km and its mass is 7.2 x 10²² kg.

       a. Calculate Earth’s average density in kg/m³.

       b. The average density of Earth’s crust is 2600 kg/m³. What does this tell you about Earth’s interior?

       c. Compute the moon’s average density in kg/m³.

       d. Compare the average densities of the moon, Earth and Earth’s crust. Argue whether the moon’s core is relatively large or small. What evidence in the moon’s formation scenario supports this?

Answer 1