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Neptune:
Cloze Activity
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Answers
Word Bank:
1846
largest
eighth
Earths
eyes
119
rings
moons
mass
red
Neptune
winds
gravitational
hollow
Sun

Neptune is the _____________________________ planet from the Sun in our Solar System. It is the fourth _____________________________ planet in our Solar System. This giant, frigid planet has a hazy atmosphere and strong _____________________________. This gas giant is orbited by eight _____________________________ and narrow, faint _____________________________ arranged in clumps. Neptune's blue color is caused by the methane (CH4) in its atmosphere; this molecule absorbs _____________________________ light. Neptune was visited by NASA's Voyager 2 in August, 1989. Before this visit, virtually nothing was known about Neptune.

Neptune cannot be seen using the _____________________________ alone. Neptune was the first planet whose existence was predicted mathematically in ___________________________ independently by J.C. Adams and Le Verrier (the planet Uranus's orbit was perturbed by an unknown object which turned our to be another gas giant, Neptune). Neptune was then observed by J.G. Galle and d'Arrest later that year. Neptune was named for the mythical Roman god of the seas.

Neptune is about 30,775 miles (49,528 km) in diameter. This is 3.88 times the diameter of the Earth. If Neptune were _____________________________, it could hold almost 60 _____________________________.

Neptune's mass is about 1.02 x 1026 kg. This is over 17 times the _____________________________ of the Earth, but the gravity on Neptune is only 1.19 times of the gravity on Earth. This is because it is such a large planet (and the _____________________________ force a planet exerts upon an object at the planet's surface is proportional to its mass and to the inverse of its radius squared). A 100-pound person would weigh _________________________ pounds on Neptune.

Each day on Neptune takes 19.1 Earth hours. A year on Neptune takes 164.8 Earth years; it takes almost 165 Earth years for Neptune to orbit the Sun once. Since _____________________________ was discovered in 1846, it has not yet completed a single revolution around the __________________________.


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