The Sun
The gas that the Sun is primarily made of.
Hydrogen
Stars are mostly made of this.
hydrogen
The current theory about the beginning of the universe.
The Big Bang
The Earth's spheres.
lithosphere, biosphere, hydrosphere, atmosphere
The three types of galaxies.
spiral, elliptical, irregular
The upper atmosphere of the sun which can only be seen during a solar eclipse.
corona
Heavier stars end their lives with this huge explosion.
Supernova
The theory that says the universe as we know it started with an infinitely hot and dense single point that inflated and stretched — first at unimaginable speeds, and then at a more measurable rate — over the next 13.7 billion years to the still-expanding cosmos that we know today.
The Big Bang Theory
The process in which carbon atoms continually travel from the atmosphere to the Earth and then back into the atmosphere.
Carbon Cycle
The Milky Way galaxy is this type of galaxy.
Spiral.
The current age of the Sun.
5 billion years
A group of stars that are like a dot to dot picture.
Constellation
The process by which when objects travel away from us in the galaxy, the wavelength of the light increases is red in colour.
Red shift
The cycle of processes by which water circulates between the earth's oceans, atmosphere, and land, involving precipitation as rain and snow, drainage in streams and rivers, and return to the atmosphere by evaporation and transpiration.
The Water Cycle
A unit used to measure distances in space.
Light-year
The number of years the Sun has remaining.
5 billion
A region of space having a gravitational field so intense that no matter or radiation can escape.
black hole
Two pieces of evidence that back up the Big Bang Theory.
-red shift
-cosmic background radiation
The rigid, outermost layer of the Earth's rocks and minerals, which consists of the crust and upper mantle.
Lithosphere
The speed of light.
3 x 108 m/s
The gas that is produced by the nuclear fusion of hydrogen atoms on the Sun.
Helium
The three possible end states of a star.
a black hole, a neutron star, a white dwarf
The theory the universe has always existed the way it is today.
Steady state theory.
This occurs when carbon dioxide (CO2) and other air pollutants collect in the atmosphere and absorb sunlight and solar radiation that have bounced off the earth’s surface. Normally this radiation would escape into space, but these pollutants, which can last for years to centuries in the atmosphere, trap the heat and cause the planet to get hotter.
Global warming
The number of galaxies.
Infinite