Science 9.1

Front

What is daytime?

Back

Daytime is the period when the sun shines on a part of Earth.

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NGSS.MS-ESS1-1

Front

How long does it take for Earth to revolve around the sun?

Back

It takes 365 1/4 days for Earth to complete one revolution around the sun.

Front

What is a full rotation of Earth?

Back

A full rotation of Earth takes 24 hours, which is one day.

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NGSS.MS-ESS1-1

Front

What are solstices?

Back

Solstices are events that occur twice a year, in June and December, marking the longest and shortest days.

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Front

What are equinoxes?

Back

Equinoxes occur twice a year, in March and September, when day and night are approximately equal in length.

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Front

What causes day and night?

Back

Day and night are caused by the rotation of Earth on its axis.

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Front

What is the axis of Earth?

Back

The axis of Earth is an imaginary line that runs from the North Pole to the South Pole.

Front

What is the significance of the sun in our solar system?

Back

The sun is the central star of our solar system, providing light and heat to the planets.

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NGSS.MS-ESS2-4

NGSS.MS-ESS2-6

Front

What happens during a solstice?

Back

During a solstice, one hemisphere of Earth is tilted closest to the sun, resulting in the longest day or the shortest day.

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Front

What is the difference between a solstice and an equinox?

Back

A solstice marks the longest or shortest day of the year, while an equinox marks the time when day and night are of equal length.

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NGSS.MS-ESS1-1