A model shows the moon between Earth and the sun, with the moon's sunlit half turned away from Earth. Which phase do observers on Earth see that night?

In a classroom model the moon sits on the far side of Earth from the sun. A student standing on the midnight side of the model looks straight up at it. Which phase is that?

Since the last new moon the moon has traveled one quarter of the way around its orbit. From North America the right half of its disc is lit. Which phase is this?

The moon has completed three quarters of its orbit since the last new moon, and half of the disc seen from Earth is lit on the left side. Which phase is this?

Just after sunset a thin lit sliver of moon sits low in the western sky, near where the sun went down, and it is thicker each evening. Which phase is this?

An observer watches the moon rise in the east at the same time the sun is setting in the west. Which phase is rising?

At sunset the moon is already high in the southern sky, and exactly half its disc is lit on the side facing the setting sun. Which phase is it?

A student walking to school at dawn sees the moon high overhead with the left half of its disc lit. Which phase is it?

The moon is almost, but not quite, opposite the sun, so more than half of the disc facing Earth is lit, and the lit part is larger each night. Which phase is this?

Two nights after a full moon, slightly less than the whole disc is lit and the lit fraction is shrinking each night. Which phase is the moon in?

Before sunrise a thin sliver of moon is lit on its left side, low in the eastern sky, and it is thinner each morning. Which phase is this?

In an orbit model, the line from Earth to the moon makes a right angle with the line from Earth to the sun. How much of the moon's disc looks lit from Earth?

Tonight is a first quarter moon, with the right half of the disc lit as seen from North America. About one week from tonight, what will observers see?

A calendar marks tonight as the new moon. Roughly two weeks later, which phase should the calendar show?

The moon was full last Tuesday. On the following Tuesday, one week later, which phase should an observer expect?

A thin waxing crescent hangs in the evening sky tonight. About four days later, how will the lit part look?

Tonight is a full moon. About 22 days from tonight, roughly which phase will the moon be in?

The moon is at third quarter tonight, with the left half of the disc lit. About one week later, what will an observer see?

A new moon happened three days ago. What should an observer look for in the western sky shortly after sunset tonight?

A full moon rose on Friday night. On Monday night, three days later, how much of the disc will be lit?

The moon is at first quarter tonight. About two weeks from tonight, which phase will it be in?

This morning a thin waning crescent was visible before sunrise. About three days from now, what will the moon be?

A student photographs the moon every clear night. The lit part grows from nothing to a full disc and then shrinks back to nothing. About how long does one full round of that pattern take?

In the moon's cycle, which phase falls between the new moon and the first quarter?

The moon is a waxing gibbous tonight. Which phase comes next in the cycle?

Which phase falls between the full moon and the third quarter in the cycle?

About how many days pass between a new moon and the first quarter moon that follows it?

A wall calendar marks every full moon for one whole year. About how many marks will the finished calendar carry?

Over ten nights a student records the lit part of the moon shrinking from a full disc toward a thin sliver. Which term describes the moon during those nights?

Starting the night after a new moon, in what order does the moon pass through the next four named phases?

The sun lights one half of the moon at all times. Why does the shape of the lit part seen from Earth change during a month?

A few times each year Earth passes directly between the sun and the moon, and the moon dims as it moves into Earth's shadow. What is that event called?

During a new moon, no lit part of the moon can be seen from Earth. Which statement explains why?

The sun lights one half of the moon at all times, no matter which phase is seen from Earth.

The moon makes its own light, which is why we can see it at night.

The same side of the moon always faces Earth. Which statement explains that?

Some students claim Earth's shadow makes the moon's phases. Which observation shows that claim cannot be right?

Why does a lunar eclipse fail to happen at every full moon?

At full moon, Earth lies roughly between the sun and the moon. Why does the whole disc look lit from Earth?

The moon's phases repeat in the same order month after month. Which fact best explains that steady pattern?