The Earth's Rotation and Its Effects on Day and Night

The video explains Earth's rotation on its axis, which takes 24 hours to complete, causing the day-night cycle. The sun's apparent motion across the sky is due to this rotation, with the sun rising in the east, being overhead at noon, and setting in the west. Shadows change throughout the day, being longest at sunrise and sunset, and shortest at noon, providing evidence of Earth's rotation.

What is the duration of one complete rotation of the Earth on its axis?

• 12 hours

• 24 hours

• 48 hours

• 36 hours

What natural phenomenon is caused by the Earth's rotation?

• Eclipses

• Tides

• Day-night cycle

• Seasons

Why does the sun appear to move across the sky each day?

• The sun is moving around the Earth

• The Earth is rotating on its axis

• The moon is blocking the sun

• The stars are moving

In which direction does the sun rise?

• North

• West

• South

• East

At what time is the sun directly overhead?

• 6 a.m.

• 12 p.m.

• 3 p.m.

• 6 p.m.

Where is the sun located in the sky during the afternoon?

• Northern sky

• Eastern sky

• Western sky

• Directly overhead

When are shadows the longest during the day?

• In the evening

• At midnight

• In the morning and afternoon

• At noon

What causes the changes in the appearance of shadows throughout the day?

• The rotation of the Earth

• The orbit of the Earth around the sun

• The movement of the moon

• The tilt of the Earth's axis

Why are shadows in the morning and afternoon on opposite sides of an object?

• The sun is in the eastern sky all day

• The sun is in the western sky all day

• The sun is in the eastern sky in the morning and western sky in the afternoon

• The sun is directly overhead all day

What is the main evidence that the Earth is rotating?

• The phases of the moon

• The changing seasons

• The occurrence of eclipses

• The apparent motion of the sun and changing shadows