HW: Ch. 20 Lesson 3 Quiz Review

What is the umbra in a shadow?

• The lighter part of a shadow where light is partially blocked.

• The central, darker part of the shadow where light is totally blocked.

• The shadow that the Moon casts on Earth's surface during a solar eclipse.

• The shadow that Earth casts on the Moon during a lunar eclipse.

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What causes a solar eclipse to occur?

• The Sun moves between the Earth and the Moon.

• The Earth moves between the Moon and the Sun.

• The Moon moves between the Sun and the Earth.

• The Moon's shadow appears on the Sun's surface.

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When does a solar eclipse occur?

• During a full moon.

• During a new moon.

• When the Earth's shadow appears on the Moon's surface.

• When the Sun's shadow appears on the Earth's surface.

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What is the penumbra in a shadow?

• The central, darker part of the shadow where light is totally blocked.

• The shadow that the Moon casts on Earth's surface during a solar eclipse.

• The lighter part of a shadow where light is partially blocked.

• The shadow that Earth casts on the Moon during a lunar eclipse.

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What does the gravitational pull of the Moon (and a small part of the Sun's gravitational pull) cause on Earth's oceans?

• Solar eclipses

• Lunar eclipses

• Tides

• The rotation of the Earth

What type of solar eclipse can be seen if you are within the Moon's umbra?

• Partial solar eclipse

• Total solar eclipse

• No eclipse

• Annular solar eclipse

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How long does a total solar eclipse last?

• No longer than about 7 minutes

• Exactly 7 minutes

• More than 10 minutes

• Less than 2 minutes

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Why don't solar eclipses occur every month?

• The Moon's orbit is not tilted compared to Earth's orbit.

• Earth and the Sun are not on opposite sides of the Moon during a new moon.

• The Moon's orbit is slightly tilted compared to Earth's orbit.

• Solar eclipses occur every new moon phase.

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What occurs when the Moon moves into Earth's shadow?

• A) A solar eclipse

• B) A lunar eclipse

• C) Earthshine

• D) A penumbral eclipse

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During which phase of the Moon can a lunar eclipse take place?

• A) New moon

• B) First quarter

• C) Full moon

• D) Last quarter

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