NATS 1570 – Questions and Answers
Rated A
What causes the seasons on Earth? ✔✔The tilt of Earth's axis (23.5 degrees) from it's orbital axis
True or False. The Moon is not lit up by the Sun at all times, which is why we see a New Moon.
✔✔False. Half of the surface of the Moon is always lit up by the Sun. We only see variations of
illumination from Earth.
What direction does the Moon orbit the Earth? ✔✔Counter-clockwise
Why is the ecliptic tilted from the celestial equator? ✔✔Because the Earth doesn't spin on the
same axis as the Sun. The two axes are tilted from each other.
When is summer solstice? ✔✔It's when the Northern hemisphere is tilted the most TOWARDS
the Sun. Near June 21st
When is winter solstice? ✔✔It's when the Northern hemisphere is tilted the most AWAY from
the Sun. Near Dec 21st
Rated A
What causes the seasons on Earth? ✔✔The tilt of Earth's axis (23.5 degrees) from it's orbital axis
True or False. The Moon is not lit up by the Sun at all times, which is why we see a New Moon.
✔✔False. Half of the surface of the Moon is always lit up by the Sun. We only see variations of
illumination from Earth.
What direction does the Moon orbit the Earth? ✔✔Counter-clockwise
Why is the ecliptic tilted from the celestial equator? ✔✔Because the Earth doesn't spin on the
same axis as the Sun. The two axes are tilted from each other.
When is summer solstice? ✔✔It's when the Northern hemisphere is tilted the most TOWARDS
the Sun. Near June 21st
When is winter solstice? ✔✔It's when the Northern hemisphere is tilted the most AWAY from
the Sun. Near Dec 21st
