Show:
Stars-I
Stars-II
Stars-III
Space & Earth
Mixed
100
Spectographs help astronomers determine what about a star?
Temperature
100
Parallax is a method used to determine a star's ....
distance from Earth
100
When a white dwarf stops glowing it becomes a
black dwarf
100
More than half of all stars are members of groups of two or more stars called _______ _______.
star systems
100
Scientists think that convection currents flow in the Earth's ...
mantle
200
A light-year is the ______________ light travels in a year.
Distance
200
How are elliptical and spiral galaxies different?
Elliptical galaxies have little gas and dust.
200
The Milky Way Galaxy is a ________ galaxy.
Spiral
200
The theory that astronomers have developed to describe the beginning of the universe is called the....
Big Bang Theory
300
The brightness of a star depends on its....
Size and temperature
300
The Hertzsprung-Russell diagram shows that main sequence stars increase in brightness as they increase in...
temperature
300
A star is born when....
nuclear fusion begins.
300
The Solar System formed from a
nebula.
300
When the solar system formed, the spheres that lost most of their gases became the ___ planets.
inner
400
The Hubble Space Telescope collects_______ _______ from above Earth's atmosphere.
visible light
400
All stars begin their lives as parts of
nebulas
400
A lifetime of a star depends on its....
mass.
400
The layer of Earth made up largely of the rocks basalt & granite is the
crust
400
As depth beneath Earth's surface increases, temperature and pressure ....
increases.
500
The chemical composition of a star can be determined using a
spectrograph
500
A supernova is the explosion of a dying...
giant or Supergiant
500
Black holes form from the remains of stars that were more than ____ times the mass of the sun.
40
500
What is the correct order (starting from the surface) of Earth's layers? Outer core Inner core Crust Mantle
Crust, Mantle, Outer core, Inner core
500
Earth's inner core is a dense ball of
solid metal.