On July 21, 1969, the American astronaut, Neil Armstrong,

became the first person to walk on the _______.

As ______________ put his foot down, Armstrong declared, “That is one small step for man, one giant leap for mankind.”

Armstrong is one of the few people who have been lucky enough to see how Earth looks from the moon.

Every day you can see the sun as it seems to rise from the eastern horizon, move across the sky, and set in the ______.

You see the sun during the day because you are on the part of the ___________ facing the sun.

You experience sunrise and sunset because Earth spins on its axis.

Earth’s axis is an imaginary line that runs from the North Pole to the South Pole and through the middle of the ________.

As ____________ spins on its axis, different parts turn to face the sun or to face away from it. This is what causes people on Earth to experience day and night.

At the same time that Earth spins on its axis, it also moves around the sun on a path called an orbit.

On July 21, _________, the American astronaut, Neil Armstrong,became the first person to walk on the moon. As he put his foot down, Armstrong declared, “That is one small step for man, one giant leap for mankind.”

Every day you can see the sun as it seems to rise from the eastern horizon, move across the sky, and set in the _________.

Earth’s axis is an imaginary line that runs from the North Pole to the South Pole and through the middle of the _________. Earth completes a full turn around its axis once every day.

At the same time that Earth spins on its axis,it also moves around the sun on a path called an ____________.

For you to see an object, it either needs to be a light source or it needs to be lit by a light ________________.

When you are standing on Earth, the moon appears to move across the night sky just as the __________ appears to move during the day.

A new moon exists when the moon is between the ________ and Earth.

A full moon exists when Earth is between the sun and the ___________.

Because the cycle of the moon’s phases repeats every _______ days, it is possible to use the previous models to predict the moon’s phase on any given date.

Reflection occurs when light bounces off an object only in a certain direction. This occurs when the surface of the object is smooth and _______________.

When using the mirror, the reading was really big at position 3 and very __________ everywhere else.

Smooth surfaces reflect _______________ more evenly and do not result in as much scattering.

Scattering occurs when light bounces off an object in all directions. This occurs when the surface of the object is rough and ___________________.

With the paper, some light was measured at all positions with only small differences between the different positions.

A mirror is smooth, it reflects all the light consistently in one direction , while the paper, because it is rough, scatters light evenly in all directions.

A mirror’s surface is smooth and shiny, while the paper’s surface is _______________.