Flashcards
physics p2g
Cards in this deck (11)
- 1what are asteroids?mini-planets or planetoids which orbit the sun
- 2properties of asteroids>most orbit between mars and jupiter
>they are large rocks that were left over from the formation of the solar system - 3what were all bodies in space formed by?when clouds of gas and dust collapsed together due to gravitational forces of attraction
- 4what does the mass of an object determine?its gravitational force
- 5what do asteroids have compared to jupiter?relatively lower masses
- 6what does jupiters gravitational force prevent?asteroids from joining together to form another planet
- 7what did scientists believe about our moon?that our moon was a result of a collision between 2 planets in the same orbit. the iron core of the other planet melted and joined with the earth's core, less dense rocks began to orbit and they joined together to form our moon
- 8what is the scientific evidence which supports the idea of the formation of the moon?>the average density of earth is 5500 kg/m cubed while that of the moon is only 3300 kg/m cubed.
>there is no iron in the moon.
>the moon has exactly the same oxygen composition as the earth, but rocks on mars and meteorites from other parts of the solar system have different oxygen compositions. - 9what are scientists constantly doing?monitoring and plotting the oaths of comets and other near-earth objects(NEOs)
- 10when does the speed of a comet increase/decrease and why?increases as it approaches the sun and decreases as it gets further away. this is due to the changing of gravitational attraction
- 11what could happen if an NEO is on a collision course with earth and how do we prevent this?it could be the end of life on earth, to prevent this, one option would be to explode a rocket near to the NEO which could alter its course enough to miss earth.
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- Flashcards on physics p2g, created by parkermolly20 on 07/06/2015.
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