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Evolution / Human Family Tree (natural selection download (charles darwin…
Evolution / Human Family Tree
natural selection
charles darwin learned that all living things have a common ancestor
in a family there are differences (variations)
natural selection is an explanation for where all life came from
natural selection is the same thing as survival of the fittest
organisms that fit their environment the best will survive and reproduce
natural selection causes evolution
Human Evolution
paleontologists found fossils of past humans
the oldest human fossil was found in africa
humans and apes share a common anccestor
modern humans are homo sapiens (wise man)
humans are primates
humans adapted to have larger brains, use tools, be taller, and create communities
Charles Darwin
charles darwin came up with the theory of evolution
he traveled and learned about many plants and animals to observe their differences
on the islands, he observed that the animals were different based on their location
he disagreed with other scientists, because he believed evolution takes a long time to happen
he wrote the book called "The Origin of Species"
the theory of evolution is supported by a lot of evidence including genetics and heredity
plant adaptation
plants adapt to get sunlight by growing towards the sun
plants adapt to get nutrients (food) by using soil, animals, and other plants.
plants adapt to get water by having roots underground
living things need to adapt to meet their needs
plants adapt to reproduce by spreading their seeds
fossils
a fassil is the remains of a once living thing
not everything becomes a fossil
a body fossil is part of the living thing
there are other types of fossils, such as trace, mold, and cast
oil and gas comes from fossils (fossils fuels)
over millions of years, plants, decomposed into fossil fuels
flu and flu vaccine
the flu virus can cause symptoms, such as a fever
the spanish flu killed a number of people
flu is caused by a virus
Vaccines are used to fight off viruses
there are different strains or versions of the virus
extinction
99% of all living things have gone extinct
climate change can lead to the extinction of species
extinction is when the whole species dies out
evolutionary pressures can also lead to extinction
about 65 million years ago, all dinosaurs went extinct
human activities affect the environment, which can cause the extinction of many species
