  The evolution of the orbits of bodies ejected from the Earth has been studied
at the stage of its accumulation and early evolution after impacts of large
planetesimals. In the considered variants of calculations of the motion of
bodies ejected from the Earth, most of the bodies left the Hill sphere of the
Earth and moved in heliocentric orbits. Their dynamical lifetime reached
several hundred million years. At higher ejection velocities vej the
probabilities of collisions of bodies with the Earth and Moon were generally
lower. Over the entire considered time interval at the ejection velocity vej,
equal to 11.5, 12 and 14 km/s, the values of the probability of a collision of
a body with the Earth were approximately 0.3, 0.2 and 0.15-0.2, respectively.
At ejection velocities vej<11.25 km/s, i.e., slightly exceeding a parabolic
velocity, most of the ejected bodies fell back to the Earth. The probability of
a collision of a body ejected from the Earth with the Moon moving in its
present orbit was approximately 15-35 times less than that with the Earth at
vej>11.5 km/s. The probability of a collision of such bodies with the Moon was
mainly about 0.004-0.008 at ejection velocities of at least 14 km/s and about
0.006-0.01 at vej=12 km/s. It was larger at lower ejection velocities and was
in the range of 0.01-0.02 at vej=11.3 km/s. The Moon may contain material
ejected from the Earth during the accumulation of the Earth and during the late
heavy bombardment. At the same time, as obtained in our calculations, the
bodies ejected from the Earth and falling on the Moon embryo would not be
enough for the Moon to grow to its present mass from a small embryo moving
along the present orbit of the Moon. This result argues in favor of the
formation of a lunar embryo and its further growth to most of the present mass
of the Moon near the Earth.
