Fill in the blank: ________ are caused by the tilt of Earth on its axis as it revolves around the sun.

Fill in the blank: ________ is the rising and falling of the water level of the oceans due to the pull of gravity of the moon and the sun.

Fill in the blank: ________ is the path of an object that revolves around another object.

Fill in the blank: ________ is the blocking of sunlight to the Earth that occurs when the moon is directly between the Sun and the Earth.

Fill in the blank: ________ is the blocking of sunlight to the moon that occurs when the Earth is directly between the Sun and the Moon.

Fill in the blank: ________ is the force of attraction that tends to draw any two objects in the universe together.

Fill in the blank: ________ is the imaginary line that passes through Earth’s center and the North and South poles, about which Earth rotates.

Fill in the blank: ________ is the spinning motion of a planet on its axis.

Fill in the blank: ________ is the movement of one object such as a planet or moon as it turns or spins around a central point.

Fill in the blank: ________ is our planet’s axis, the imaginary line it spins around is not perfectly straight up and down but is tilted (slanted) at an angle.

Fill in the blank: As the moon orbits the Earth, the Sun lights up different parts of it, making it seem as if the Moon is changing ________.

Fill in the blank: ________ is the Moon phase in which more than half of the Moon appears to be illuminated/lit.

Fill in the blank: ________ is the Moon phase in which less than half of the Moon appears to be illuminated/lit.

Fill in the blank: ________ is the Moon phase when the entire side facing the Earth is illuminated/lit up.

Fill in the blank: ________ is a Moon that is completely dark because its unlit side is facing the Earth.

Fill in the blank: ________ is the period during which the visible surface of the Moon decreases, gets smaller.

Fill in the blank: ________ is the period during which the visible surface of the Moon increases, gets bigger.