Astronomy: Unit 2 Test '-Earth's Sky REVIEW

Front

How many times per month does a spring tide occur?

Back

Twice

Front

What is the darkest inner part of the shadow cone called, where a total eclipse can be viewed?

Back

Umbra

Front

Why does Polaris not seem to move during the night?

Back

Because it is located directly above the North Pole.

Front

Which moon phase is occurring at #8?

Back

Waning crescent.

Front

What type of tides would this arrangement of earth-moon-sun create?

Back

Spring tide.

Front

What is a spring tide?

Back

A tide that occurs when the sun, moon, and Earth are aligned, resulting in higher high tides and lower low tides.

Front

What is a neap tide?

Back

A tide that occurs when the sun and moon are at right angles relative to Earth, resulting in lower high tides and higher low tides.

Front

What is the penumbra?

Back

The outer part of a shadow where partial eclipse can be observed.

Front

What is the significance of Polaris in navigation?

Back

Polaris, or the North Star, is used for navigation because it remains nearly stationary in the sky.

Front

What causes the phases of the moon?

Back

The phases of the moon are caused by the changing angles of sunlight hitting the moon as it orbits Earth.