What is a similarity between the first-quarter moon and the third-quarter moon? (1 point)
The moon is located perpendicular to Earth and the sun.
O The moon is located between Earth and the sun.
O The moon is always waxing in both phases
The moon is always waning in both phases
The moon is always waning in both phases.
The correct answer is: O The moon is always waning in both phases.
To determine the similarity between the first-quarter moon and the third-quarter moon, we need to understand the characteristics of these phases.
The first-quarter moon occurs when half of the Moon's face appears to be illuminated by sunlight, while the other half is in shadow. On the other hand, the third-quarter moon occurs when half of the Moon's face is in shadow, while the other half is illuminated.
From the given options, we can eliminate the answer choices that do not match the characteristics of both phases:
- The first option, "The moon is located perpendicular to Earth and the sun," does not apply to both phases. The Moon's position in relation to Earth and the Sun varies throughout its orbit.
- The second option, "The moon is located between Earth and the sun," is also incorrect. The Moon's position between Earth and the Sun is only applicable to the new moon phase.
- The third option, "The moon is always waxing in both phases," is incorrect. The first-quarter moon is associated with the waxing phase, while the third-quarter moon is part of the waning phase.
Therefore, the correct answer is the fourth option: "The moon is always waning in both phases." Both the first-quarter moon and the third-quarter moon are part of the Moon's waning phase, where the illuminated portion decreases until reaching the new moon phase.