Which of the following statements is not a description of Earth's moon? The moon has a very thin atmosphere. The moon has some of the oldest rocks in the solar system. The moon's rotation is the same as its revolution. The moon has the same temperature all around.

To determine which statement is not a description of Earth's moon, let's analyze each statement one by one:

1. "The moon has a very thin atmosphere."

   • This statement is true. The moon has an extremely thin atmosphere called an exosphere, which is composed of sparse particles.

2. "The moon has some of the oldest rocks in the solar system."

   • This statement is also true. Lunar rocks brought back by the Apollo missions have been dated to be over 4 billion years old, making them some of the oldest known rocks.

3. "The moon's rotation is the same as its revolution."

   • This statement is true as well. The moon is tidally locked with Earth, meaning its rotation period is the same as its orbital period around Earth, which is why we always see the same side of the moon.

4. "The moon has the same temperature all around."

   • This statement is false. The moon experiences extreme temperature variations between its day and night sides. During the lunar day, temperatures can soar to about 127°C (260°F), while during the lunar night, they can plummet to about -173°C (-280°F).

Therefore, the statement that is not a description of Earth's moon is: "The moon has the same temperature all around."