Chapter 17 Test
Chapter 17
Section 1
Section 2
Section 3
Section 4
Section 1
Section 2
Section 3
Section 4
Terms
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- Cenozoic
- era is the time in which Home sapiens evolved
- Amphibians
- the first backboned animals on land
- Species
- known as a group of organisms that normally reproduce only among themselves
- Why is the fossil record from this time so limited
- rocks have been buried and changed by heat and pressure
- Trilbote
- small marine creatures that walked along the seafloor
- when did animals without backbones called invertabrates develop
- near the end of the precambrian time
- when did the palezoic era begin
- about 545 million years ago
- when did the ozone layer begin to develop
- following the apearance in cyanobacteria
- Why do you think some people argue against preserving habitats?
- they want the government to keep making money and dont care about the habitats
- In what epoch, period, and era do you live in?
- Cenezoic era, recent epoch. and quademary period
- Lifeforms and geologic events
- determines the divisions or eras and periods on the geologic time scale
- When does the Paleozoic Era begin
- when organisms develop hard parts
- Natural Selection
- process by which organisms with traits that are suited to a certain enviroment have a better chance of survival than organisms whose traits are not suited to it
- Eras
- major subdivisions of the geologic timescale based on differences in life- forms
- when was the earth born
- 4.5 billion years ago
- what were most life forms
- marine meaning they live in the water
- Habitat
- where organisms live, grow, and interact with each other and with the enviroment
- Stromatolites
- fossil records begin with fossilized cyanobacteria
- why do you think fossils from organisms during the Precambrian time are so sparse
- b/c invertabrates are soft
- When did the first dinosaur appear
- triassic period
- list three ways humans cause extinctions
- by making changes in the enviroment, over hunting, and logging