History Flashcards
What is evolution?
Idea that all species are descendants of ancient species that are different from modern-day species
Archbishop James usher
① earth created on Oct 23 4004 bc at 9 am
② used bible book of Genesis astronomy, history to determine
Lord Kelvin
Determine the age of earth
- 15 to 20 million years
Pierre curie
① discovered radioactive decay which disproved lord kelvin’s theory
earth is 4.6 billion
James Hutton
Uniformitarianism: the landforms and geological features is an explanation of the past
Charles Lyell
Rock formations are formed slowly and gradually
2 conclusions of uniformitarianism
① earth is very old
② dramatic change results from long periods time
Georges Cuvier
Studied fossils:
① catastrophes cause extinction
② more complex species are at shallow depths
Jean-baptiste Lamarck
“Theory of acquired characteristics /environentalism”
Adaptation: evolve and change
Spontaneous generation: becoming more complexspecies
Thomas Malthus
Potential for exponential growth
Food & resources can limit population
Charles Darwin
Finding mates that have must desirable traits to pass on to the next generation
Varying globally
Look & act similar but are in different continents
E.g. Emu in south America & ostrich in Africa
Varying locally
Related species in different avers of same environment
① land and water turtles
Varying overtime
Fossils show descendants
① glyptodont similar-to armadillo