1- The Moon is between the Earth and Sun during which phase of the Moon? A) Firs
ID: 112533 • Letter: 1
Question
1- The Moon is between the Earth and Sun during which phase of the Moon?
A) First Quarter
B) New Moon
C) Waxing Gibbous
D) Full Moon
2- The time for the Earth to orbit the Sun in 365.25 days. Therefore the modern calendar incorporates ____.
A) Months of varying length
B) The seasons
C) Leap year
D) The solstices
3- Rotation of the Moon(spin on its axis)____
A) Does not occur
B) Allows us to see each side of the Moon during the year
C) Cause eclipse
D) Is the same length of time as its own revolution period.
4- Observations from a telescope in Antarctica would be limited by which of the following issues? Choose all that are true?
A) Observations could not see stars in June.
B) Observation could not see stars in December
C) Stars near the North Pole are not ever visible
D) The Moon would always be too bright to see dimmer sets of stars.
5- What are 2 reasons we experience seasons?
Explanation / Answer
1)B.New moon
In astronomy, the new moon is the first phase of the Moon, when its orbit is not seen from the Earth; it is at this moment when the Moon and the Sun have the same ecliptical longitude.The Moon is not visible at this time except when it is seen in silhouette during a solar eclipse when it is illuminated by earthshine
The original meaning of the phrase new moon, sometimes still used in non-astronomical contexts, was the first visible crescent of the Moon, after conjunction with the Sun. This takes place over the western horizon in a brief period between sunset and moonset.
2)C) Leap year
Leap years are needed to keep our modern day Gregorian calendar in alignment with the Earth's revolutions around the sun.It takes the Earth approximately 365.242189 days – or 365 days, 5 hours, 48 minutes, and 45 seconds – to circle once around the Sun. This is called a tropical year and is measured from the March equinox.
However, the Gregorian calendar has only 365 days in a year, so if we didn't add a leap day on February 29 nearly every four years, we would lose almost six hours off our calendar every year. After only 100 years, our calendar would be off by around 24 days!
3)D) Is the same length of time as its own revolution period.
The moon orbits the Earth once every 27.322 days. It also takes approximately 27 days for the moon to rotate once on its axis. As a result, the moon does not seem to be spinning but appears to observers from Earth to be keeping almost perfectly still. Scientists call this synchronous rotation.
5)During the year, the seasons change depending on the amount of sunlight reaching the Earth as it revolves around the Sun.Earth has seasons because our planet’s axis of rotation is tilted at an angle of 23.5 degrees relative to our orbital plane, the plane of Earth’s orbit around the sun.The tilt in the axis of the Earth is called its obliquity by scientists.
Elliptical Path Around the Sun
Earth's path around the Sun is not circular, nor is the Sun situated at the center of this path. Instead, Earth's orbit is elliptical, with the Sun closer to one end of the orbital path than the other. This means that Earth’s distance from the Sun varies throughout the year.The varying amounts of sunlight around the Earth during the year creates the seasons.
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