Lifeforms Introduction to Unit Vocab for 8L42 Powell 8 th Grade Science Watch Isnt Evolution Just a Theory httpwwwpbsorgwgbhevolutioneducatorsteachstuds svideoshtml ID: 547841
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Slide1
Unit 6: Evolution of Landforms and Lifeforms
Introduction to Unit
Vocab. for 8.L.4.2
Powell – 8
th
Grade ScienceSlide2Slide3
Watch:
“Isn’t Evolution Just a Theory?”
http://www.pbs.org/wgbh/evolution/educators/teachstuds/
svideos.html
Fill out the chart on your worksheet!Slide4
Objectives for Unit 6
8.L.4.2
Explain the relationship between genetic variation and an organism’s ability to adapt to its environment. Slide5
Objectives for Unit 6
8.L.4.1
Summarize the use of evidence drawn from geology, fossils and comparative anatomy to form the basis for biological classification systems and the theory of evolution. Slide6
Objectives for Unit 6
8.E.2.1
Infer the age of Earth and relative age of rocks and fossils from index fossils and ordering of rock layers (relative dating and radioactive dating). Slide7
Objectives for Unit 6
8.E.2.2
Explain the use of fossils, ice cores, composition of sedimentary rocks, faults, and igneous rock formations found in rock layers as evidence of the history of the Earth and its changing life forms. Slide8
VOCAB. for 8.L.4.2
GENETIC VARIATION
http://learn.genetics.utah.edu/content/variation/sources
/
Variation in alleles of genes, providing the genetic material for natural selection; also, characteristics that make members of same species different from one anotherSlide9
VOCAB. for 8.L.4.2
Genotype
The genetic makeup of an organism or an individualSlide10
VOCAB. for 8.L.4.2
Phenotype
Organisms observable characteristics or traits, such as physical properties or behaviorsSlide11
VOCAB. for 8.L.4.2
Mutation
A random change to a gene that results in a new DNA sequence.
http://learn.genetics.utah.edu/content/variation/mutation
/
Are mutations always bad? How do they play a role in genetic variation?Slide12
VOCAB. for 8.L.4.2
Adaptation
An inherited mutation in an organism’s DNA that provided an advantage for a species survivalSlide13
VOCAB. for 8.L.4.2
Artificial Selection
Outside forces guiding the selection of desired traitsSlide14
VOCAB. for 8.L.4.2
Charles Darwin
http://www.brainpop.com/science/famousscientists/charlesdarwin
/
Naturalist who proposed & provided scientific evidence that all species of life evolved over time from common ancestors through process called natural selectionSlide15
VOCAB. for 8.L.4.2
Natural Selection
http://www.brainpop.com/science/ecologyandbehavior/naturalselection
/
Survival of the fittest organisms that are the best adapted to their environment and the ones that will live long enough to reproduce & pass on their favorable adaptationsSlide16
VOCAB. for 8.L.4.2
Speciation
The process of natural selection producing a new species out of existing species over thousands or millions of years
Examples of Speciation w/
Pics
:
http://education.nationalgeographic.com/education/encyclopedia/speciation/?ar_a=
1Slide17
VOCAB. for 8.L.4.2
Diversity
The condition of having or being composed of differing elements
Think About It:
How could diversity benefit a population or a species? Consider genetic variation and natural selection. Slide18
VOCAB. for 8.L.4.2
Extinction
The complete elimination (dying out) of a species due to the species inability to survive and therefore adapt to its environment. Slide19
Watch:
“Why Does Evolution Matter Now?”
http://www.pbs.org/wgbh/evolution/educators/teachstuds/
svideos.html