metallic asteroids are composed of up to 80% iron and 20% a mixture of nickel, iridium, palladium, platinum, gold, and other precious metals.
200
About how many asteroids are in the asteroid belt?
Over a million
200
If the tail is___________ we can see it from earth.
bright enought
300
Comets reflect approximately____________ of the light that falls on them
4%
300
In what country is it illegal to buy and or sell meteorites?
South Africa
300
How many miles across is the biggest asteroid?
600 miles across
300
Does the asteroid belt contain all the asteroid?
no
300
What is the scientific form of passing through the liquid stage?
sublimation
400
What is the most well known comet?
Halley's Comet
400
When a fireball explodes in the atmosphere, it is called a?
bolide
400
What classes of asteroids are there
c class,s class, and v class
400
Does anything other than asteroids orbit the asteroid belt?
yes comets do to
400
what does solar radiation mean?
radiation, or energy we get from the sun. It is also known as short-wave radiation.
500
Leftover comets create what?
meteor showers
500
What is the direction meteor showers come from?
Radiant
500
What do asteroids become if they hit earth?
meteorites
500
What is the largest asteroid called?
Ceres
500
Do comets have a second tail? If so how does it form
Yes This one is called an ion or gas tail and it is formed when the ices of the nucleus are heated and turn directly into gases without passing through the liquid stage -- a process called sublimation.