Michigan Test for Teacher Certification (MTTC) Secondary Integrated Science Practice test

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Prepare for the Michigan Test for Teacher Certification Secondary Integrated Science Test. Study with interactive quizzes, engaging flashcards, and detailed explanations. Ensure your success and build confidence for the exam!

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During which phase is the entire half of the moon visible from Earth?

Waning crescent
New moon
Full moon
Waxing crescent

The correct answer is: Full moon

The full moon phase is characterized by the entire face of the moon being illuminated and visible from Earth. This occurs when the Earth is positioned directly between the sun and the moon, allowing sunlight to fully illuminate the moon's surface that faces our planet. In this position, observers on Earth can see 100% of the moon's illuminated hemisphere, resulting in a bright and fully visible moon in the night sky. During other phases, such as the new moon, waning crescent, and waxing crescent, only a portion of the moon's surface is illuminated by sunlight, leading to less than half of the moon being visible from Earth. This is why those phases do not represent a time when the entire half of the moon can be seen.