Exploring the Concepts of Day and Night

The video tutorial explains the concept of day and night, highlighting the sun's apparent movement across the sky due to Earth's rotation on its axis. It describes how the Earth's tilt and rotation cause the cycle of day and night, and how this results in time differences across the globe. The video also shares fun facts about day and night, including the winter and summer solstices, and the mass of the sun in the solar system.

What is the main reason we experience day and night?

• The moon blocks the sun's light.

• The Earth rotates on its axis.

• The sun moves around the Earth.

• The stars influence the Earth's light.

In which direction does the sun appear to move across the sky?

• From west to east

• From north to south

• From east to west

• From south to north

What is the imaginary line called that the Earth rotates around?

• Orbit

• Axis

• Meridian

• Equator

What angle is the Earth's axis tilted at?

• 30 degrees

• 45 degrees

• 23.5 degrees

• 15 degrees

What happens to the part of the Earth that is facing away from the sun?

• It experiences dawn

• It experiences twilight

• It experiences night

• It experiences day

How long does it take for the Earth to complete one full rotation?

• 72 hours

• 24 hours

• 12 hours

• 48 hours

When it is daytime in India, what is it in the United States?

• Daytime

• Morning

• Nighttime

• Afternoon

What is the shortest day of the year called?

• Midnight sun

• Winter solstice

• Equinox

• Summer solstice

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What is the longest day of the year called?

• Equinox

• Winter solstice

• Midnight sun

• Summer solstice

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CCSS.RI.6.5

CCSS.RI.7.5

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What percentage of the solar system's mass does the sun contain?

• 50%

• 75%

• 90%

• 99%