Exploring Stars and the Moon

What is the term for the path that the Earth takes as it revolves around the Sun?

• Orbit

• Axis

• Rotation

• Eclipse

Answer explanation

The term 'orbit' refers to the curved path that Earth follows as it revolves around the Sun. This distinguishes it from 'axis' (the tilt of Earth), 'rotation' (spinning on its axis), and 'eclipse' (the blocking of light).

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DOK Level 1: Recall

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Which phase of the moon occurs when the moon is not visible from Earth?

• Full Moon

• New Moon

• First Quarter

• Last Quarter

Answer explanation

The New Moon phase occurs when the moon is positioned between the Earth and the Sun, making it not visible from Earth. In contrast, the Full Moon is fully illuminated and visible.

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DOK Level 1: Recall

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Why do we see different stars in the sky during different seasons?

• The stars move to different positions.

• The Earth orbits around the Sun.

• The stars change their brightness.

• The stars disappear and reappear.

Answer explanation

We see different stars in the sky during different seasons because Earth revolves around the Sun. As it orbits, our viewpoint changes, revealing different constellations and stars at various times of the year.

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DOK Level 2: Skill/Concept

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How long does it take for the Earth to complete a rotation on its axis?

• 12 hours

• 24 hours

• 30 days

• 365 days

Answer explanation

Earth takes approximately 24 hours to complete one full rotation on its axis, which defines the length of a day. Therefore, the correct answer is 24 hours.

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DOK Level 1: Recall

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What causes day and night on Earth?

• The revolution of the Earth around the Sun

• The rotation of the Earth on its axis

• The orbit of the Moon around the Earth

• The movement of the Sun across the sky

Answer explanation

Day and night on Earth are caused by its rotation on its axis. As the Earth spins, different parts face the Sun, creating daylight, while the opposite side experiences night.

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DOK Level 2: Skill/Concept

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Describe the pattern of stars in the sky during a single night.

• They change position randomly.

• They remain in the same position all night.

• They appear to move across the sky.

• They disappear and reappear.

Answer explanation

Throughout the night, stars appear to shift across the sky due to the Earth's rotation. This movement creates the illusion that stars are moving, while they actually remain in fixed positions relative to each other.

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DOK Level 2: Skill/Concept

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What is the main reason the Moon appears to change shape over a month?

• The surface of the Moon changes.

• The Moon moves closer and farther from the Earth.

• The position of the Moon in relation to the Earth and the Sun changes.

• The Moon rotates on its axis.

Answer explanation

The Moon appears to change shape due to its position relative to the Earth and Sun. As it orbits, different portions of its illuminated side are visible from Earth, creating the phases of the Moon.

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DOK Level 2: Skill/Concept

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Explain why the Sun appears to move across the sky during the day.

• The Sun is moving around the Earth.

• The Earth is rotating on its axis.

• The position of the Sun changes in space.

• The stars are moving.

Answer explanation

The Sun appears to move across the sky because Earth is rotating on its axis. This rotation causes different parts of the Earth to face the Sun at different times, creating the illusion of the Sun's movement during the day.

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DOK Level 3: Strategic Thinking

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How does the Earth's revolution around the Sun affect the visibility of constellations?

• It makes the constellations change shape.

• It makes some constellations visible only in certain seasons.

• It makes all constellations visible all year round.

• It has no effect on the constellations.

Answer explanation

Earth's revolution around the Sun changes our perspective of the night sky, making some constellations visible only during specific seasons while others may be visible year-round.

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DOK Level 3: Strategic Thinking

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What is the relationship between the Earth's rotation and the apparent movement of the Sun?

• The Earth's rotation causes the Sun to rise in the west.

• The Earth's rotation causes the Sun to rise in the east and set in the west.

• The Earth's rotation has no effect on the Sun's movement.

• The Earth's rotation causes the Sun to stay in one place.

Answer explanation

Earth's rotation on its axis causes the Sun to appear to rise in the east and set in the west, creating the daily cycle of daylight and darkness we experience.

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DOK Level 3: Strategic Thinking

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