Science Chapter 20
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 Sun occupies ______ of our solar system. | 99.9%
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| The energy of the sun is due to the | fusion process
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| The fusion process gives off | light and heat
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| The sun's core is very dense gas at _____ degrees. | 15,000,000
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| Energy of the sun travels through | radiative zone, convection zone, photosphere, chromosphere and finally the corona.
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| Which layer of the sun do we see from earth? | photosphere
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| It takes the _____minutes for light to travel from the Sun to the Earth. | 8
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| What is the outermost layer of the Sun? | Corona
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| What is Auroras? | Glowing lights produced by electrically charged solar winds.
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| Fusion produces _______ in the sun. | energy
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| Fusion may vary in | size, brightness and temperature
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| Light Year | The distance light travels in one year
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| Amount of light(temperature) and distance from earth determines | brightness
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| Parallax is the | apparent shift in position of an object
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| The size of the sun is ______ times bigger than earth. | 100
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| You need a telescope to see | white dwarfs (star)
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| What determines the white, blue or red colors of stars? | Temperature
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| Higher mass stars develop more _________ than lower mass stars. | quickly
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| The main sequence stage of a lower mass star produces energy through | fusion of hydrogen into helium
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| Lower mass stars will last | billions of years
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| Our sun has been a main sequence star for 4.6 billion years and will be one for another _______years | 5 billion
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| Pulsars | strong emissions of xrays occur and sometimes radio waves
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| Supernovas collapse into a ______. | black hole
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| The Milky way galaxy measures more than | 100,000 years from the sun
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| What makes up our galaxy | space, stars and planets
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| Milky Way galaxy is a ___________ galaxy | spiral
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| The center bulge of a spral galaxy is a _______________. | black hole
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| Spiral galaxies also have | sprial arms
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| Elliptical galaxies are shaped like | eggs
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| Irregular shape galaxies are | w/o a definite shape
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| Our galaxy has a black hole | with a mass 3 million times that of the sun.
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| black holes are invisible as gases are pulled toward the | center
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| The universe consists of | space, energy and matter
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| The doppler effect is | a change in the observed wavelength
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| The universe began during | THE BIG BANG THEORY
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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.
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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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