Why Seasons Change - Middle School Earth and Space Science
Card 1 of 25
What is the name for the shortest day of the year in the Northern Hemisphere?
What is the name for the shortest day of the year in the Northern Hemisphere?
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Winter solstice (around December). Occurs when the North Pole tilts maximally away from the Sun.
Winter solstice (around December). Occurs when the North Pole tilts maximally away from the Sun.
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Identify the season in a hemisphere experiencing shorter days and a lower noon Sun.
Identify the season in a hemisphere experiencing shorter days and a lower noon Sun.
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Winter. These conditions result from tilting away from the Sun.
Winter. These conditions result from tilting away from the Sun.
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What does it mean that Earth’s axis keeps the same direction in space during orbit?
What does it mean that Earth’s axis keeps the same direction in space during orbit?
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The axis stays nearly parallel (points near Polaris). Axis orientation remains fixed while Earth orbits.
The axis stays nearly parallel (points near Polaris). Axis orientation remains fixed while Earth orbits.
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Which statement is correct: Earth is closer to the Sun in NH summer or in NH winter?
Which statement is correct: Earth is closer to the Sun in NH summer or in NH winter?
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Earth is closer in NH winter (around early January). Perihelion occurs in January, during Northern Hemisphere winter.
Earth is closer in NH winter (around early January). Perihelion occurs in January, during Northern Hemisphere winter.
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What is perihelion: Earth’s closest point to the Sun or farthest point from the Sun?
What is perihelion: Earth’s closest point to the Sun or farthest point from the Sun?
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Earth’s closest point to the Sun. Occurs around January 3rd each year.
Earth’s closest point to the Sun. Occurs around January 3rd each year.
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What is aphelion: Earth’s closest point to the Sun or farthest point from the Sun?
What is aphelion: Earth’s closest point to the Sun or farthest point from the Sun?
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Earth’s farthest point from the Sun. Occurs around July 4th each year.
Earth’s farthest point from the Sun. Occurs around July 4th each year.
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Which season occurs in the Southern Hemisphere when the Northern Hemisphere has summer?
Which season occurs in the Southern Hemisphere when the Northern Hemisphere has summer?
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Winter. Opposite tilts create opposite seasons simultaneously.
Winter. Opposite tilts create opposite seasons simultaneously.
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Identify the Northern Hemisphere season at the December solstice.
Identify the Northern Hemisphere season at the December solstice.
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Winter. The Northern Hemisphere tilts maximally away from the Sun around December 21.
Winter. The Northern Hemisphere tilts maximally away from the Sun around December 21.
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What is the name for the longest day of the year in the Northern Hemisphere?
What is the name for the longest day of the year in the Northern Hemisphere?
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Summer solstice (around June). Occurs when the North Pole tilts maximally toward the Sun.
Summer solstice (around June). Occurs when the North Pole tilts maximally toward the Sun.
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Which latitude experiences at least $24$ hours of daylight near the June solstice?
Which latitude experiences at least $24$ hours of daylight near the June solstice?
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Areas north of the Arctic Circle. The tilt keeps the Arctic Circle in continuous sunlight during summer solstice.
Areas north of the Arctic Circle. The tilt keeps the Arctic Circle in continuous sunlight during summer solstice.
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Which location experiences the most extreme seasonal daylight changes: equator or near the poles?
Which location experiences the most extreme seasonal daylight changes: equator or near the poles?
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Near the poles. High latitudes experience continuous daylight or darkness due to Earth's tilt.
Near the poles. High latitudes experience continuous daylight or darkness due to Earth's tilt.
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Identify the Northern Hemisphere season at the June solstice.
Identify the Northern Hemisphere season at the June solstice.
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Summer. The Northern Hemisphere tilts maximally toward the Sun around June 21.
Summer. The Northern Hemisphere tilts maximally toward the Sun around June 21.
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What is the main cause of Earth’s seasons: Earth’s axial tilt, Earth–Sun distance, or Earth’s rotation rate?
What is the main cause of Earth’s seasons: Earth’s axial tilt, Earth–Sun distance, or Earth’s rotation rate?
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Earth’s axial tilt (about $23.5^\circ$). The tilt causes different hemispheres to receive varying amounts of direct sunlight throughout the year.
Earth’s axial tilt (about $23.5^\circ$). The tilt causes different hemispheres to receive varying amounts of direct sunlight throughout the year.
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What is the approximate angle of Earth’s axial tilt relative to its orbit (the ecliptic)?
What is the approximate angle of Earth’s axial tilt relative to its orbit (the ecliptic)?
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About $23.5^\circ$. This tilt remains constant as Earth orbits the Sun, creating seasonal variations.
About $23.5^\circ$. This tilt remains constant as Earth orbits the Sun, creating seasonal variations.
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Which option best describes Earth’s orbit shape: perfect circle or slightly elliptical?
Which option best describes Earth’s orbit shape: perfect circle or slightly elliptical?
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Slightly elliptical. The orbit is an ellipse with the Sun at one focus, though nearly circular.
Slightly elliptical. The orbit is an ellipse with the Sun at one focus, though nearly circular.
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What is the direct reason summers are warmer: longer days, shorter days, or faster rotation?
What is the direct reason summers are warmer: longer days, shorter days, or faster rotation?
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Longer days and more direct sunlight. Direct sunlight concentrates energy, and longer days provide more heating time.
Longer days and more direct sunlight. Direct sunlight concentrates energy, and longer days provide more heating time.
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What happens to the Sun’s angle in the sky during summer in a hemisphere?
What happens to the Sun’s angle in the sky during summer in a hemisphere?
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It is higher; sunlight is more direct. Direct rays concentrate solar energy over a smaller area, increasing heating.
It is higher; sunlight is more direct. Direct rays concentrate solar energy over a smaller area, increasing heating.
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What happens to the Sun’s angle in the sky during winter in a hemisphere?
What happens to the Sun’s angle in the sky during winter in a hemisphere?
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It is lower; sunlight is less direct. Oblique rays spread energy over a larger area, reducing heating per unit area.
It is lower; sunlight is less direct. Oblique rays spread energy over a larger area, reducing heating per unit area.
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What is the correct relationship between Sun angle and energy per area on the ground?
What is the correct relationship between Sun angle and energy per area on the ground?
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Higher Sun angle gives more energy per unit area. Direct rays concentrate the same energy into a smaller surface area.
Higher Sun angle gives more energy per unit area. Direct rays concentrate the same energy into a smaller surface area.
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Which hemisphere has summer when the Northern Hemisphere has winter?
Which hemisphere has summer when the Northern Hemisphere has winter?
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The Southern Hemisphere. Earth's tilt causes opposite seasons in the two hemispheres simultaneously.
The Southern Hemisphere. Earth's tilt causes opposite seasons in the two hemispheres simultaneously.
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Identify the season in the Northern Hemisphere when it is tilted toward the Sun.
Identify the season in the Northern Hemisphere when it is tilted toward the Sun.
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Summer. The tilt toward the Sun increases daylight hours and solar angle.
Summer. The tilt toward the Sun increases daylight hours and solar angle.
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Identify the season in the Northern Hemisphere when it is tilted away from the Sun.
Identify the season in the Northern Hemisphere when it is tilted away from the Sun.
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Winter. The tilt away from the Sun decreases daylight hours and solar angle.
Winter. The tilt away from the Sun decreases daylight hours and solar angle.
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Which event occurs when the Sun’s direct rays strike the equator and day and night are nearly equal?
Which event occurs when the Sun’s direct rays strike the equator and day and night are nearly equal?
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An equinox. Occurs around March 20 and September 23 when neither hemisphere tilts toward the Sun.
An equinox. Occurs around March 20 and September 23 when neither hemisphere tilts toward the Sun.
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Which event occurs when a hemisphere is maximally tilted toward or away from the Sun?
Which event occurs when a hemisphere is maximally tilted toward or away from the Sun?
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A solstice. Marks the start of summer or winter when tilt effect is greatest.
A solstice. Marks the start of summer or winter when tilt effect is greatest.
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Which model feature best explains opposite seasons in the two hemispheres at the same time?
Which model feature best explains opposite seasons in the two hemispheres at the same time?
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Earth’s axial tilt causes opposite sunlight angles and day lengths. One hemisphere tilts toward Sun while the other tilts away.
Earth’s axial tilt causes opposite sunlight angles and day lengths. One hemisphere tilts toward Sun while the other tilts away.
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