Lesson 6-Daylength

Which of these changes would likely occur if the rate of Earth's rotation on its axis increased?

• The length of the seasons would be shorter.

• The length of the seasons would be longer.

• The length of a day would be shorter.

• The length of a day would be longer.

The model shows Earth in several positions relative to the sun.

In which position is it winter in North America?

• Position 1, because North America receives the most direct sun

• Position 2, because North America is tilted toward the sun

• Position 3, because North America is parallel to the sun

• Position 4, because North America is tilted away from the sun

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A student wants to use a spinning basketball to model the day-and-night cycle on Earth.

What should the student do in order to best model the cause of the day-and-night cycle?

• Spin the ball in different directions

• Tilt the ball while it is spinning

• Paint one half of the ball black and the other half white

• Shine a bright light on one side of the ball

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Which of these locations on Earth experiences the least change in the number of daylight hours throughout the year?

• Equator

• North Pole

• Tropic of Cancer

• Tropic of Capricorn

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Earth would not have seasons if it --

• no longer tilted on its axis

• stopped rotating on its axis

• took an additional month to orbit the sun

• revolved around the sun in the opposite direction

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How does the tilt of the Earth look as it rotates around the Sun?

• The tilt is always in the same direction
• The tilt is the same in spring/fall and different in summer/winter
• The tilt is variable and changes seasonally
• Answer not shown

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What is the tilt of the Earth on its axis?

• 30 degrees
• 24.5 degrees
• 23.5 degrees
• 22 degrees

How does the tilt of the Earth‘s axis affect the number of hours of sunlight that are hitting the Earth?

• Sunlight hours are the same all year
• Sunlight hours are greater when tilted toward the Sun
• Sunlight hours are greater when tilted away from the Sun
• Sunlight hours are variable and unpredictable

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What causes nighttime and daytime on Earth?

• the Sun rotating on its axis  
• Earth rotating on its axis
• Earth revolving around the Sun
• the Moon revolving around Earth

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Which number most likely shows the position of the Sun at noon? The picture shows an event that happens every day.

• 1
• 2
• 3
• 4

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