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 explains how life started
Organisms that fit their environment the best will survive and reproduce
Natural Selection is the same thing as survival of the fittest
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 ancestor
Modern humans are homo sapiens (wise human)
Humans are primates
Humans adapted to have larger brains, use tools, and create communities.
Charles Darwin
Charles Darwin came up with the Theory of Evolution
He disagreed with other scientists because he believed that evolution takes a long time to happen.
He traveled and learned about many different plants and animals to observe their differences.
On the islands he observed that the animal were different based on their location/environment.
He wrote the book called the Origin of Species
The theory of evolution is supported by lots of evidence such as genetics and heredity
Fossils
A body fossil is part of the living thing
Not everything becomes a fossil
There are other types of fossils such as trace, mold, and cast
Oil and gas comes from fossils (fossil fuels)
A fossil is the remains of a once-living thing
Over millions of years, plants decomposed into fossil fuels
Plant Adaptation (Jr)
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
Plants adapt to reproduce by spreading their seeds (pollen)
Livings thing need to adapt to meet their needs.
Flu and Flu vaccine
Spanish flu killed a number of people
Vaccines are used to fight off viruses
The flu virus can cause symptoms, such as a fever
There are different strains (versions) of the virus
Flu is caused by a virus
Viruses can mutate and evolve
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 extinction
Homo Group
Australopithecus group
Paranthropus Group
Ardipithecus Group
This group was able to walk staright however they still climbed trees they lived around 3.3 million years ago. They lied in various places in Africa.
These are our oldest ancestors which were the closest to other animals and they started to make progress into walking. They mostly lived in eastern and western aftrica
We are in this category which means that we have discovered the whole world instead of just staying in Africa and we also have bigger brains compared to our ancestors
Living in Eastern and Southern Africa at this time humans had extremely strong teeth which helped them eat several different foods.