Cooper 08-22-12 Word Scramble
|
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Question | Answer |
What did people around the world connect to the patterns they saw in the sky? | stories about imaginary beings |
What has greatly increased out knowledge about the universe? | new tools and scientific theories |
What causes objects in space to be grouped together in difference ways? | Gravity |
What is Earth's diameter? | 13,000 km (8,000 miles) |
What is an orbit? | Path of an object in space as it moves around another object because of gravity |
What is the solar system? | the sun, planets, and various smaller bodies |
The only star in our solar system | Sun |
What galaxy is our solar system a part of? | Milky Way |
What is a galaxy? | Millions of stars held together by their own gravity. |
Why does our galaxy appear to us as a hazy band of light? | because most of the stars are so far away |
What is the universe? | Everything - space and all matter and energy in it |
What is a constellation? | Group of stars that form a pattern in the sky |
What relationship exists among the stars in a constellation? | They often appear to be grouped together when viewed from Earth but are actually far apart from one another |
Why can't you see all of the constellations at once? | Earth blocks half of space from your view |
What star does the North Pole point to? | North Star (or Polaris) - Directly over your head |
What can you use Polaris to figure out? | Directions or location |
What can't you see a star's movement? | Because you're so far away |
What does the Greek word for "planet" mean? | Wanderer |
Why is it easy to see the movements of Mars and Venus? | The two closest to the Earth |
What led early astronomers to believe that Earth was at the center of the universe? | Because it appears that the sky was moving around Earth |
What did astronomers eventually discover? | Earth and other planets orbit the sun |
How many stars are in the entire universe? | More than we can count |
The rotation of Earth makes constellations __ | Appear to change positions |
Polaris seems to stay in the same place because __ | It is straight above the North Pole |
Other stars near the North Pole seem to __ | move in a circle around Polaris |
earth, galaxy, solar system, universe What is the correct order from largest to smallest? | Universe, galaxy, solar system Earth |
The Milky Way is one of about __ | 100 billion galaxies |
What have astronomers determined to be found throughout the universe by looking at the spectra of light from stars and galaxies? | The same elements are found throughout the universe and the same physical forces and processes are everywhere. |
What is the closest galaxy to us? | Andromeda Galaxy |
How long does it take the light from the galaxy closest to us take to reach the Earth? | 2 million years |
Why can astronomers learn about the past by looking at distant galaxies? | They can see how the universe developed over the past. |
A change in the observed wavelength or frequency of a wave that occurs when the source of the wave or the observer is moving. | Doppler Effect |
The Doppler Effect occurs with __ as well as __. | light, sound |
Light from a galaxy moving toward Earth will have a __ shift in the spectrum. | blue |
Light from a galaxy moving away from Earth will have a __ shift in the spectrum. | red |
In what way are galaxies moving? | the universe is expanding which moves the galaxies apart |
How are galaxies moving in relation to each other? | the father away they are the faster they are moving |
What did astronomers conclude about all of the matter in the universe? | the universe itself is expanding |
The moment in time when the universe started to expand out of an extremely hot, dense state | the Big Bang |
When did the Big Bang occur? | 14 billion years ago |
What is one important source of evidence for the Big Bang? | microwave radiation |
What happened to the matter and energy as the universe rapidly expanded? | It went through a series of changes |
What is one way that scientists are learning about the development of the universe? | Performing experiments in particle accelerators |
What do these huge machines do? | expose matter to extreme conditions |
When did the earliest stages of the universe's development occur? | tiny fraction of a second |
How long did it take for the first elements to form? | 300,000 years |
When did stars, planets, and galaxies begin to appear? | within the next billion years |
Created by:
terri.french
Popular Science sets