1. How do scientists know how hot the core is?
A. Thermometers
Seismic waves
C. Oil wells
D. Measure the electromagnetic
spectrum

When the ionic compound nabr dissolves in water, br– ions are pulled into solution by the attraction between what two particles? a. the na+ and br– ions b. the na+ ion and the negative end of a water molecule c. the br– ion and the positive end of a water molecule d. the br– ion and the negative end of a water molecule