13 metoerid come and slay Flashcards
What is a meteoride
Floating piece of stone and metal that moves in space
What is an asteroid
Large metal and rocky body that travels around Sun in its own orbit
What is a comet
Small body of mixture of ice, gas & frozen dust
Travels around sun on its own orbit
What is size of meteroid
10 µm (micrometer) to 1m
Meteroid is made of what & originates from?
Stones and metals - iron & nickel
Fragments of asteroids & comets
What is surface temperature & speed of meteroid
0C
varying speed, fastest - 42km/s
What is size of asteroid
1m - 1000km
Large asteroids - Ceres, Pallas, Juno, Vesta ~ diameters of a few km - 1000 km
What is surface temperature & speed of asteroid
Cold, -73C
25km/s
Asteroids form an
Asteroid belt between orbits of Mars & Jupiter
Asteroids are know as
Small planets
Comet is made of what parts & length
Tail - 150 000 000km
Head - 240 000km
What is comet made of
Gas & water that freeze into ice
Dust
Rocky particles
How does comet travel & what speed
Around Sun in its own elliptical orbit
10km/s - 70km/s
Difference in movement of meteoroids, asteroids & comets
Asteroids & comet - have their own orbit around Sun
Meteoroids - Move freely in space & influenced by gravitational pull of planets, moon & other objects
When is it called a meteor
Meteoroid enters Earth’s atmosphere
Molecular friction between air & meteor -> heat -> burns & streak of light
What is a meteor shower
When many meteors enter Earth at same time
What are meteorites
Meteors that can reach Earth
Usually meteors will burn our before reaching earth
Will form craters
Which asteroids have asteroid orbits outside asteroid belt
Apollo
Amor
Aten
Why are orbits outside asteroid belt dangerous to Earth
Can be near / intersect with Earth orbit
Collision can happen at intersection point / trails near orbit
Result in destruction of living things
Most comets are from?
Kuiper belt & Oort cloud
State the effect on Sun on comet’s tail
Gets closer to sun, increases in speed, melts, long tail
Tail aways away from Sun - solar wind blowing from Sun
What causes comet to easily slip out of orbit
Strong gravitational pull of outer planets
