3. Which statement is NOT true about Earth's magnetic field? a. It has reversed directions many times in Earth's past.
b. It originates in Earth's core.
c. It protects Earth from harmful cosmic rays and particles from the Sun.
d. Its strength has remained the same throughout history,

Which term best describes the form sound takes as it travels away from a drum (a- gas)(b-music) ( c-waves) (d-particles

Which of the following represents the ester functional group? a. -coo- b. -cho c. -cooh d. c=o

Count the number of each type of atom in the equation below, and then balance the equation. write in the numbers of atoms and coefficients. add a 1 if there should be no coefficient. cs2(l) + o2(g) → co2(g) + so2(g) c [ ] s [ ] o > c [ ] s [ ] o [ ] cs2(l) + [ ] o2(g) > [ ] co2(g) + [ ] so2(g)