Question

The moon is Earth’s only 1______________ satellite. As well as this, it is the second brightest object in the sky after the sun and although it has the 2_____________ of being bright white, its surface is actually dark. The moon is thought to have formed 3_________________ 4.5 billion years ago, not long after Earth. There have been several theories about its origin, but the current most accepted explanation is that the moon formed from the debris left over after a giant impact between Earth and a Mars-sized body called Theia. The moon remained 4_______________ until 1959, when it was visited by the Soviet spacecraft Luna 2, and it was last visited by humans in 1972. In the summer of 1994, the Moon was very 5__________________ mapped by the little spacecraft Clementine, and again in 1999 by Lunar Prospector.

Answer 1

The moon is Earth’s only NATURAL satellite. As well as this, it is the second brightest object in the sky after the sun and although it has the APPEARANCE of being bright white, its surface is actually dark. The moon is thought to have formed APPROXIMATELY 4.5 billion years ago, not long after Earth. There have been several theories about its origin, but the current most accepted explanation is that the moon formed from the debris left over after a giant impact between Earth and a Mars-sized body called Theia. The moon remained UNEXPLORED until 1959, when it was visited by the Soviet spacecraft Luna 2, and it was last visited by humans in 1972. In the summer of 1994, the Moon was very EXTENSIVELY mapped by the little spacecraft Clementine, and again in 1999 by Lunar Prospector.