Geologists can use waves to learn about earth's interior. p waves travel faster than s waves. s waves travel through solids only, which tells geologists that the core is liquid. geologists call the outer, solid area of earth the crust; the next layer is the . finally, at the very center, is the core.

hormones in blood stream

image: dtc.ucsf.edu

endocrine glands secrete hormones into the blood stream near them; the hormones then travel in our bloodstream until it reaches its destination, called a target cell, in distance parts of the body. in the target tissue, hormones lock onto the target’s plasma membrane, called the receptor site.

blah

explanation:

bc blah

enhanced global partnerships and exploration capabilities may advance international preparedness for protecting the earth from catastrophic events such as some asteroid strikes, advancing collaborative research on space weather and protecting spacecraft by developing new means for space debris removal.