Apologia Astronomy lesson 12
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| The _________________ ___________ is a lot like the Asteroid Belt, but the objects are larger and colder. | Kuiper Belt
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| Objects in the Kuiper Belt look a lot like Pluto so they have been called _______________. | Plutinos (or little Plutos)
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| In 2002 an object was found in the Kuiper Belt that is about half the size of Pluto. It was named _________________. | Quaoar
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| Pluto is usually considered the 9th planet, however for a ___________ year period during its orbit, it switches places with Neptune to become the 8th planet. | 20
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| What year was Pluto discovered in? | 1930
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| Pluto looks a lot like a comet's _____________ which is made of ice with rocks mixed in it. | nucleus
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| Pluto rotates in the opposite direction compared with most planets. Name two other planets that also rotate in the opposite direction. | Venus and Uranus
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| It takes __________ Earth days for Pluto to rotate on its axis. (So a day on Pluto is this many Earth days.) | 6
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| Pluto is called a "_________ _________" like Uranus because is looks like it is lying on its side. | sleepy planet
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| The revolution period (time it takes for it to revolve around the Sun once) is _________ Earth years for Pluto. | 248
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| Pluto has seasons. (true or false) | true
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| NASA has sent an unmanned spacecraft to Pluto called _______ _______________ which is scheduled to arrive in 2015. | New Horizons
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| Pluto has a mooon named _______________. | Charon
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| Pluto's moon is not much smaller than Pluto and is very close to Pluto causing them to be called a ____________ ____________ by some astronomers. | double planet
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| Be able to list 5 reasons (from your book) why Pluto may not be a planet. (There are more than 5 listed in book---I have listed them all for you.) | Possible answers:(1) It's too small to be a planet.(2) It has a highly elliptical orbit.(3) It orbits on a slanted plane. (4) It's moon is too big compared to Pluto's size.(5) It is the only non-gaseous planet of the outer planets.
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| (con't list of reasons why Pluto may not be a planet) | (6) It looks like a comet. (7) It looks like a Kuiper Belt object. (8) It is not large enough to be a planet.
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| Pluto is named for the Roman god of the ______________. | underworld
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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