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What Causes Day and Night

Interactive passage with audio narration, comprehension questions, and printable PDF.

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Format: Interactive (Online), Printable (PDF)
Grades: 5678
Subjects: scienceela
Standards: MS-ESS1-1
Languages: English, Spanish

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What's included

Reading passage

Reading comprehension

Audio narration

With word word highlighting

Comprehension quiz

Auto-graded

Writing activity

Open-ended response

Glossary & flashcards

Vocabulary practice

Differentiated version

Adapted for varied levels

Spanish translation

Bilingual support

About this reader

This comprehensive middle school science reading passage explores what causes day and night on Earth. Aligned with NGSS standards MS-ESS1-1 and MS-ESS1.B, the passage explains how Earth's rotation on its axis creates the daily cycle of light and darkness. Students learn that Earth completes one full rotation every 24 hours, causing the side facing the Sun to experience daytime while the opposite side experiences nighttime. The passage includes real-world examples, such as how different locations experience sunrise at different times, and explains why the line between day and night constantly moves across the planet. Audio-integrated content supports diverse learners, including English Language Learners and students with reading difficulties. The passage is accompanied by comprehension questions, writing activities, and graphic organizers that help students understand cause-and-effect relationships in Earth systems. Vocabulary support includes key terms like rotation, axis, hemisphere, and orbit, all defined in an accessible glossary for grades 6-8.

Written by Workybooks TeamPublished by Workybooks

Sample passage and quiz content

CONTENT PREVIEW

"iss059e025207". image by NASA (Public domain).

What causes day and night on Earth? The answer lies in Earth's constant rotation on its axis. Our planet spins like a top, completing one full rotation every 24 hours. This spinning motion creates the cycle of day and night that we experience every single day.

Earth rotates around an imaginary line called an axis that runs through the North and South Poles. As Earth spins, different parts of the planet face toward or away from the Sun. The hemisphere facing the Sun receives direct sunlight and experiences daytime. At the same moment, the hemisphere facing away from the Sun is in shadow and experiences nighttime. Scientists explain that this rotation never stops, which means the line between light and dark continuously moves across Earth's surface.

The speed of Earth's rotation determines the length of our day. Earth rotates at approximately 1,000 miles per hour at the equator. This might seem fast, but the rotation is so smooth that we cannot feel it. Evidence shows that Earth's rotation can be observed by tracking the Sun's apparent movement across the sky. The Sun appears to rise in the east, move overhead, and set in the west. However, the Sun is not actually moving around Earth. Instead, Earth's rotation makes it seem like the Sun is moving.

Consider what happens in New York City and Tokyo. When it is noon in New York, the Sun is high in the sky and people are eating lunch. At that exact moment, it is midnight in Tokyo, and the city is dark. Six hours later, the Sun begins to set in New York while dawn approaches in Tokyo. This happens because Earth's rotation brings different locations into and out of sunlight. The terminator is the name scientists use for the moving line that separates day from night on Earth's surface.

Understanding day and night helps us comprehend Earth's place in the solar system. Our planet's rotation affects weather patterns, ocean currents, and the behavior of living things. Many animals use the day-night cycle to know when to hunt, sleep, or migrate. Humans have built entire societies around this 24-hour cycle, creating schedules for work, school, and rest. Earth's rotation is one of the most fundamental motions that shapes life on our planet.

Interesting Fact: Earth's rotation is gradually slowing down by about 1.7 milliseconds per century. This means that dinosaurs experienced slightly shorter days than we do today!

How long does it take Earth to complete one full rotation on its axis?

12 hours24 hours48 hours365 days

What is the axis of Earth?

The path Earth follows around the SunAn imaginary line through Earth from North Pole to South PoleThe line that separates day from nightThe speed at which Earth rotates

What is the term scientists use for the line that separates day from night on Earth?

EquatorAxisTerminatorHemisphere

Why does the Sun appear to move across the sky during the day?

The Sun actually orbits around EarthEarth's rotation makes it seem like the Sun is movingThe Sun moves from east to west each dayClouds block our view of the stationary Sun

When it is noon in New York City, what time is it in Tokyo?

Noon6:00 AMMidnight6:00 PM

What causes one side of Earth to experience daytime?

That side is closer to the SunThat side is facing toward the SunThat side rotates fasterThat side has more clouds

At approximately what speed does Earth rotate at the equator?

100 miles per hour500 miles per hour1,000 miles per hour5,000 miles per hour

How does Earth's rotation affect living things?

It has no effect on living thingsIt only affects plantsIt helps animals know when to hunt, sleep, or migrateIt only affects humans

True or False: We can feel Earth spinning because it rotates so fast.

TrueFalse

True or False: The line between day and night on Earth stays in the same place.

TrueFalse