Earth in Space Unit
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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| Space is filled with trillions of what? | Stars
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| Groups of stars are called what? | Galaxies
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| What do we call the pictures formed in the night sky from connecting the dots formed by visible stars? | Constellations
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| What are the two main gases that stars, including our sun, are made from? | Hydrogen and Helium
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| Stars are able to produce their own what? | Heat and light
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| Where does the heat and light of stars come from? | Nuclear Fusion
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| Astronomers have recognized a total of how many different constellations? | 88
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| Because of Earth's _____________ around the sun, different constellations are visible in the night sky at different times of the year. | Revolution
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| When you refer to the brightness of a star, you are referring to its what? | Magnitude
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| A star's magnitude can be either what or what? | Apparent or Absolute
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| What does apparent magnitude mean? | How bright a star appears from Earth
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| What does absolute magnitude mean? | How bright a star looks from a set distance
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| A star is born from a cloud of gas and dust in space called a what? | Nebula
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| Stars are classified in two different ways- according to their what and what? | Size and Color
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| The hottest stars are what color? | Blue
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| The coolest stars are what color? | Red
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| What does the H-R Diagram show the relationship between? | Absolute Magnitude and Spectral Type
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| Besides being used to classify stars, what is another use for the H-R Diagram? | To understand how stars change over time
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| What does the word "spectral" refer to when we talk about stars? | Color
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| Why does our sun have such a bright apparent magnitude when it has suck a dim absolute magnitude? | Because it's closer to Earth
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| How many years old is the sun? | 4.5 billion years old
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| How many more years should the sun continue to shine? | 5 billion more years
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| What is the surface of the sun; what do we see when we look up at the sun? | Photosphere
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| Besides making life possible on Earth, the sun also provides us with what? | Heat and Light
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| Loose collections of ice, dust, and small rocky particles whose orbits are usually very long, narrow ellipses are called what? | Comets
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| What is a comet usually referred to as? | A dirty snowball
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| What are the two places called where comets are most found? | Kuiper Belt and Oort Cloud
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| Where are the most asteroids located? | Asteroid Belt
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| What do we call a chunk of rock or dust in space which come from comets and asteroids? | Meteoroids
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| A falling star is actually a what? | Meteor
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| When a meteor hits the Earth's surface, it is called what? | Meteorite
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| A galaxy is a huge collection of what? | Stars, gas, and dust
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| Scientists have classified the galaxies according to how many different shapes? | Three
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| What is a spiral galaxy? | Shaped like a flattened disk, usually has one or more spiral arms, bulge in the middle, looks like a pinwheel
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| What is an elliptical galaxy? | Large, 3-D, very common, resembles a slightly flattened ball
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| What is a barred spiral galaxy? | Stars and gases in a central bar; shape due to uneven forces
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| What is an irregular galaxy? | Smaller, less common, fainter galaxies, no regular shape, closest neighbors to our galaxy
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| What galaxy do we live in? | The Milky Way Galaxy
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