A synodic month is longer than a sidereal month because the Earth-Moon system is orbiting the Sun in the same direction as the Moon is orbiting the Earth.
(A synodic month; is; longer than a sidereal month; because the Earth-Moon system is orbiting the Sun in the same direction) (the Earth-Moon system; is orbiting; the Sun; in the same direction) (the Moon; is orbiting; the Earth) (A synodic month; is longer than; a sidereal month)
A synodic month the Earth-Moon system the Moon A synodic month
is is orbiting is orbiting is longer than
longer than a sidereal month because the Earth-Moon system is orbiting the Sun in the same direction
the Sun in the same direction
the Earth
a sidereal month