Moles â¢ The mass of 1.0 mole of an element is equal to the atomic mass in grams. â¢ One mole element = 6.022 x 10 23 atoms. This number is called Avogadroâs number. â¢ Example: 1 mole of C atoms weighs 12.0 g and has 6.02 x 10 23 atoms.
The Moon travels around the Earth. The Moon travels around the Earth in a circle called an orbit. How long does it take the Moon to orbit the Earth? The Moon takes about 27 days (27 days, 7 hours, 43 minutes, 11.6 seconds) to go all the way around the Earth and return to its starting position. The Moon's orbit around the Earth is a slightly squashed circle called an ellipse.
If you chart the moon's position every night for a full month, you could compare its position with a bright star, and then wait to see how long it takes for the moon to come back to its position relative to that star. The answer would be about 27 1/3 days. But during this time, the earth has moved nearly 1/12 of the way in its orbit around the sun. So to get from one full moon to the next would take about two days longer, 29 1/2 days, because the moon would have to travel a little further around the earth to get to full again.