EMS 3.2 Exit Ticket

What is the Antikythera mechanism?

• A set of metal gears used for navigation at sea

• A set of metal gears that predicted patterns in the position of the sun, the Moon, and the planets

• An ancient timekeeping device used by Greek philosophers

• A musical instrument found in the Mediterranean Sea

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Where was the Antikythera mechanism found?

• In a museum in Greece

• In the remains of an ancient sunken ship in the Mediterranean Sea

• Buried beneath the city of Athens

• Inside a hidden cave on the island of Antikythera

What did the Antikythera mechanism help ancient astronomers predict?

• The outcome of gladiatorial games

• The weather patterns for agriculture

• The patterns in the appearance of the sun, the planets, and especially the Moon

• The rise and fall of ancient civilizations

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How did the Antikythera mechanism indicate the phase of the Moon?

• By using a series of water clocks

• By casting shadows on a sundial

• By moving a little moon ball with one white and one black side to show the illuminated and dark side of the Moon

• By emitting sounds at different moon phases

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What did ancient astronomers notice about lunar eclipses that led to the creation of the Antikythera mechanism?

• They noticed that lunar eclipses happened every full moon.

• They noticed that lunar eclipses happened in patterns.

• They noticed that lunar eclipses could be predicted with simple tools.

• They noticed that lunar eclipses were a random occurrence.

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Why don't lunar eclipses happen every time the Moon is full, according to the text?

• Because the Earth's orbit is not perfectly aligned with the Moon's orbit.

• Because the Sun's light is not strong enough to reach the Moon.

• Because the Moon is not always in the Earth's shadow.

• Because the ancient astronomers' observations were incorrect.

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What is the phase of the moon during a lunar eclipse?

• New moon

• First quarter

• Full moon

• Last quarter

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Which of these things is true about the Moon?

• The Moon is always moving around Earth in a circle.

• The Moon is always in the same position in Earth’s sky.

• The Moon is always moving in many changing patterns around Earth.

• The Moon is always moving back and forth across Earth’s sky.

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Tania went outside and made two observations of the Moon that were several days apart. Her observations are shown above. The light part of the Moon appeared to get larger over time. Why did this happen?

• The Moon moved so that Tania was able to see more of the half that faces the sun.

• The Moon moved closer to the sun so more sunlight reached the Moon’s surface.

• The Moon rotated so that more of the light-colored rock on the Moon’s surface faced Earth.

• Earth’s shadow moved and was blocking less of the Moon so Tania was able to see more of it.

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The diagrams above show Earth and the Moon in different positions, as seen from above. Sunlight is coming from the left but Moon is dark in all of them. Could the half of the Moon that faces Earth ever be completely dark in any of these diagrams? Remember what causes a lunar eclipse!

• No, the Moon is always lit by the sun.

• Yes, the Moon is always be completely dark in Diagrams 2 and 3, but never in Diagram 1.

• Yes, the Moon is always completely dark in Diagram 1, but never in Diagrams 2 or 3.

• Yes, the Moon is always completely dark in Diagram 2 and sometimes could be dark in Diagram 3.

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