Asap 20 points!
how are scientists able to determine which layers of the earth are solid and which layers are liquid?
direct evidence:
indirect evidence:

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.

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