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

What did the first language sound like

Blood has traveled from the heart to the toes. which describes the next step of the circulation process?

The large increase in atmospheric carbon dioxide in the last 50 years most likely comes from a. an increase in cellular respiration b. increased decomposition by bacteria c. an increase in the burning of fossil fuels d. an increase in photosynthesis