Which statement most accurately describes the composition of elements dissolved in sea water?

only a few elements
only sodium and chloride
only a few besides found in trace amounts in addition to sodium and chloride
more than 97 elements are found in trace amounts in addition to sodium, chlorine, and magnesium

equal distribution i think.

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.

which

what is a measurement of the earth’s history divided into time periods?

> fossil record <

sedimentary rock

> geologic time scale <

radioactive elements