In utah's arches national park we can see many interesting shapes like this one. many different things to shape this arch: earthquakes, rivers, freezing water, and wind. only one of these made the surface of the arch smooth and rounded. that was a) earthquakes. b) strong winds. c) water freezing in the cracks. d) a river running through the rocks.

the mantle

explanation:

earth is divided into three layers: the crust or the outermost layer on which we live; the underlying, middle layer - the mantle - and the core (the innermost layer of earth).

it's all four options.

the density of gold = 19.3 g/cm3

the relation between density and mass and volume is

density = mass / volume

given :

mass of gold = 13 g

density = 13g / volume = 19.3

volume = 13 /19.3 = 0.67 cm^3

thus volume of gold nugget = 0.67 cm^3