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31 Cards in this Set
- Front
- Back
- 3rd side (hint)
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The first orbit of a neutral atom holds how many electrons? |
The first orbit holds 2 electrons |
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How many electrons are in the second orbit of a neutral atom? |
There are 8 electrons.. |
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How many electrons in the third orbit of a neutral atom? |
8 |
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How many atoms in the fourth orbit of a neutral atom? |
18 |
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According to bohr, when a element is energized by heat the electrons jump to _________ orbits. |
Higher |
When they jump back down |
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Is potassium more or less reactive then sodium? |
More |
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What is static electricity |
An electric charge at rest |
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Define insulator |
Anything which does not allow the free flow of electrons . |
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Define conductor |
Anything which allow the free flow of electrons |
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State the three laws of electricity |
Like charges repel Unlike charges attract Charge objects always attract a neutral |
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Define electric current |
An electric charge in motion along a complete and continuous path called a circuit |
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Define voltage |
The energy of electrons upon leaving the source |
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Define load |
Any electrical device which converts electrical energy into another useable form such as light, heat or mechanical energy |
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How long ago do astronomers believe the big bang occurrd |
13.6 billion years ago |
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What does red shift mean |
Means the galaxy is moving away from us |
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Galaxies farther away from earth are moving faster or slower away from galaxies closer to earth |
The farther away the galaxy the faster it moves away |
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how do most stars form |
Rotating clouds of dust and gas , material accumulated force of gravity increases with mass to gather more matter |
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What does the colour of a star tell you |
Temperature, age, |
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What is the occurrence when solar winds collide with earths magnetic feild |
Auroras |
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Which planets are the inner or terrestrial planets. |
Mercury , Venus, earth , Mars |
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Which planets are the outer gas giants |
Jupiter Saturn Uranus and Neptune |
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What is found between Mars and Jupiter |
Astroid belt |
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Which planets will have the longer revolution inner or outer planets |
Outer planets |
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Define light year. What is the speed of light |
Distance light travels in one year and the speed of light is ( 3X 10 M/S ) |
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Explain the difference between a meteoroid , meteor, and in meteorite |
Meteoroid is a metal or rock smaller than an astroid pulled by or is gravity I meteor is a shooting star Meteorites are those which not completely burned up upon entry in reach the ground |
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What is the difference between rotation and revolution |
Tatian is the spinning of a body on its own axis for example it takes 24 hours to rotate on its axis and revolution is the mole movement about another object example it takes the earth 365 days to revolve around the sun |
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Why do we have seasons on earth |
The tilt of the earth in revolution about the side effect the angle of incidence |
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What are some of the limitations to space travel |
Food, fuel, waste, oxygen, and loss of body muscle |
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Why does the Comets tail always points away from the sun |
The solar wins blows the tales away from the sun |
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What is the only planet that has one moon |
Earth |
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Which of the following is an example of population 1. All the animals in the valley 2. All the rattlesnakes and garter sharks in the a valley 3. All the pacific rattlesnakes in the galley |
ALLL the pacific rattlesnakes |
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