Which sources do scientists use to study the interior of Earth? Check all that apply.
Earth's orbit
core samples
sea level
earthquakes
S waves
rock composition

Nucleic acid certain protein cell membranes certain carbohydrates

Works together in the synthesis, modification, packaging, and transport of lipids and proteins

Johnny rode his bike to a friend's house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was not able to play. what was his displacement for the total bike ride? how did you determine this? what could we use as a reference point to determine he was in motion during his bike ride? why can you use it as a reference point