Stars
Protostar
This icy celestial body develops a glowing coma and a tail when it approaches the Sun due to solar radiation and wind.
Comet
This theory suggests that the universe began from an infinitely small point, expanding rapidly in a process known as cosmic inflation.
Big Bang Theory
The ______________ of light from distant galaxies provides evidence for the expansion of the universe.
red shift
Which star is the hottest out of the following: blue-white, white, yellow or red?
Blue-white
Found mainly between Mars and Jupiter, this region contains numerous rocky bodies that never formed into a planet.
Asteroid belt
This theory, proposed by Johannes Kepler, posits that the Sun is at the center of the universe and that all planets revolve around it.
Heliocentric
This faint radiation, discovered in 1965, is considered a remnant of the Big Bang and fills the entire universe.
Cosmic Microwave Radiation Background
When a medium-sized star runs out of hydrogen, it turns into a.......
Red giant
This type of celestial body orbits a planet and can be natural, like the Moon, or artificial, like those used for communication
Satellite
This ancient model of the universe, proposed by Ptolemy, places Earth at the centre, with all other celestial bodies orbiting around it.
Geocentric
The abundance of light elements, such as _________ and __________, is consistent with the Big Bang Theory.
hydrogen and helium
A red supergiant will end its life as either a _________ or a ____________.
Neutron star or black hole
These small rocky or metallic objects enter Earth’s atmosphere and burn up, often called "shooting stars."
Meteor
According to this theory, the universe is unchanging, with stars and celestial bodies remaining in fixed positions throughout time.
Static Universe Theory
What is the percentage of hydrogen and helium in nuclear matter?
Hydrogen 75%, helium 25%
The outward pressure pushing outward keeps a star stable. What causes this outward pressure?
Nuclear fusion
The largest planet in our solar system, this gas giant is known for its Great Red Spot, a massive storm.
Jupiter
According to the Big Bang Theory, how old is the universe?
13.7 billion (will accept 13.8 billion)
What process created light elements in the early universe and supported predictions of the Big Bang Theory?
Nuclear Fusion