Understanding Earth's Rotation

The video explains Earth's rotation on its axis, which takes 24 hours to complete, causing the day-night cycle. It describes how the sun's apparent motion across the sky is due to this rotation, with the sun rising in the east and setting in the west. The video also covers how shadows change throughout the day, providing evidence of Earth's rotation. Shadows are longest at sunrise and sunset and shortest at noon, with their positions changing from morning to afternoon. The video aims to enhance understanding of these concepts.

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

In which direction does the sun appear to rise due to Earth's rotation?

• North

• South

• East

• West

Where is the sun located in the sky at noon?

• On the horizon

• Directly overhead

• In the west

• In the east

What causes the apparent movement of the sun across the sky?

• Moon's orbit

• Sun's movement

• Earth's revolution

• Earth's rotation

When are shadows the longest during the day?

• At sunrise and sunset

• At noon

• In the morning

• In the afternoon

What is the relationship between the sun's position and shadow length at noon?

• Shadows are medium length

• Shadows are longest

• Shadows are shortest

• Shadows are absent

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

• Because of the moon's phases

• Due to Earth's revolution

• Because of the sun's position in the sky

• Due to seasonal changes

What is the significance of understanding shadow changes throughout the day?

• It helps in predicting weather

• It indicates Earth's rotation

• It shows the sun's movement

• It explains the moon's phases

What evidence supports the fact that Earth is rotating?

• Changing seasons

• Apparent motion of the sun and shadows

• Tidal patterns

• Lunar eclipses