Chapter 4
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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| Force that resists motion | Friction
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| Galaxy that we live in | Milky Way
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| One of the 3 galaxies closest to ours | Small Magellanic Cloud
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| One of the 3 basic galactic shapes | spiral
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| Large cloud of gas and dust floating in space | nebulae
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| An area containing no air or any other matter | vacuum
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| Star system containing from millions to billions of stars | galaxy
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| Scientists who study outer space | astronomers
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| Galaxy that resembles an egg or football | elliptical
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| Study of outer space and all that it contains | astronomy
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| Dark patches on the sun's photosphere | sunspots
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| Part of the sun visible only during solar eclipse | chromosphere or corona
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| High-speed streamof particles thattravel outward from holes in the sun's corona and beats upon the earth's upper atmosphere | solar wind
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| 3 basic types of galaxy shapes | spiral, elliptical, irregular
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| Stars that outline a picture in the sky | constellation
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| Familiar shape withinthe constellation Ursa Major which contains pointer stars | Big Dipper
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| Hottest region of the sun | Core
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| Streams of gas erupting from the chromosphere and returning in looplike fashion | Solar prominence
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| Spiral arms attached to a straight bar that runs through a galaxy | Barred spirals
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| Brightest star in the night sky | Sirius
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| Pole star | Polaris
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| Closest star to the earth | Sun
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| Brightest star in constellation Leo | Regulus
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| Brightest star in constellation Perseus | Algol
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| Imaginary line that stretches from pole to pole | axis of rotation
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| Star system that contain millions of billions of stars | Galaxy
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| Cluster with about 40 galaxies in which we find Earth | Local Group
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| How many miles away from the Earth is the sun? | 93 million miles
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| Part of the sun's atmosphere closest to the surface | chromosphere
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| Hottest region of the sun's atmosphere | corona
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| Pair of stars that travel together and rotate around each other as the moon does the earth | binary stars
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| Actual explosion of a star | supernova
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| What is space like? | no air (vacuum), no air friction, mostly black, weghtlessness. extremes of temperature
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| What is the difference between apparent magnitude and absolute magnitude? | Apparent magnitude is the measurement used to describe the brightness of a star as it appears from earth. Actual brightness of a star is called absolute magnitude.
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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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