1. Luna, Our Moon Galileo was first to discover large mountains among craters called lunar highlands Dark regions, known as maria, are a result of lava cooling in low areas

2. Moon’s Rotation and Revolution rotation and revolution occur once every 27.3 days due to rotation and revolution being the same speed, one side of the moon is always visible and the other side is never seen moonlight is actually reflected sunlight

3. Tides Moon’s gravity pulls on Earth, with places on Earth closer to the moon results in harder pulling Bulges occur on the sides of Earth closet to and farthest from moon (high tides) As the Earth rotates, different areas experience high and low tides

4. Sun’s Effect on Tides Sun has about ½ tide generating force as Moon When Sun, Moon, and Earth are aligned, high tides are higher and low tides are lower (spring tide) When Sun, Moon, and Earth are at 90 degrees, high tide lower and low tide higher (neap tide)