Space and the Origin of the Universe (Junior Cert Science): Flashcards
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Practise the cards
10 cards from this deck
Astronomy
Astronomy
Science exploring universe beyond Earth's atmosphere
Star
Star
Celestial object producing own light & heat via nuclear fusion
Three criteria for planet classification
Three criteria for planet classification
Orbits star, round shape, cleared orbital region
Comet composition
Comet composition
Dusty snowball made of ice and dust
Direction of comet tail
Direction of comet tail
Always points away from the Sun
Gravity in the universe
Gravity in the universe
The 'glue' of the universe; force of attraction
Geocentric model of universe
Geocentric model of universe
Earth at centre, proposed by Ptolemy
Heliocentric model of universe
Heliocentric model of universe
Sun at centre, proposed by Copernicus
Age of universe (Big Bang)
Age of universe (Big Bang)
About 14 billion years ago
Three pieces of Big Bang evidence
Three pieces of Big Bang evidence
Cosmic radiation, expanding universe, distant galaxies