How do scientists identify cycling from winter to summer when analyzing the ice cores? What causes this to happen?

Are the earth's ocean floor and continents the same age geologically? why or why not?

Which part of the neuron below is indicated by the arrow, and what is its function? hormones send chemical signals throughout the body to regulate other body processes. hormones are chemical signals that are sent throughout the body to regulate other body processes. hormones send electrical signals throughout the body to regulate other body processes. hormones are electrical signals that are sent throughout the body to regulate other body processes.

You see a white marker with an orange circle and black lettering. what does this marker tell you