the big bang Flashcards
what’s a theory?
an idea intended to explain something
what is the big bang theory?
a theory about how the formation of the universe
When was the big bang?
13.8 billion years ago
what happened 4.6 billion years ago?
our sun was formed
how old is earth?
4.5 billion years old
was the big bang quick or slow
quick
was the big bang quiet or loud?
quiet
what was there before the big bang?
nothing
what happened 3.5 billion years ago?
the first living cells were created -creating humans!
what is evolution?
the process of change slowly happening over time to improve life chances and survival
what is extinction?
when a species dies out because ur couldn’t adapt or change
what is mass extinction?
when many species die out all at once
e.g. when the dinosaurs food and habitat got wiped out resulting in them dying of starvation
examples of extinct animals
woolly mammoths, giant elk, sabre toothed tiger
what is the geological timescale?
a scale from the start of time divided into specific blocks with. knowledge science have learned from rocks and fossils and main events
an example of a time period from the geological timescale?
jurassic, triassic
