science 7 2nd Flashcards
adaption
a charichteristic that improve an individuals ability to survive and reproduce in a particular in a specific envierment
species
a group of organisms that are closely related and can mate to produce fertile offspring
Evolution
this procces in which inheareted characteristics within a population change over generations such that new species sometimes arise
Fossil
The remains or physical evidence of an organism preserved by geological process
Fossil records
A historical sequence of life indicated by fossils found in layers of the Earth’s crust
Trait
Genetically determined characteristic
Selective breeding
The human practice of breeding animals or plants that have a certain desired characteristic
Natural selection
The process by which individuals that are better adapted to their environment survive and reproduce more successfully than less well adapted individuals do a theory to explain the mechanism of evolution
Generation time
A period between the birth of one generation and the birth of the Next Generation
Speciation
The formation of a new species as a result of evolution
Relative dating
Any method of determining weather and event or object is older or younger than your other events or objects
Absolute dating
any method of measuring the age of an object or event in years
Geologic time scale
Standard method used to divide the Earth’s long natural history into manageable Parts
Extinct
Scribes a species that has died out completely
Plate tectonics
The theory that explains how large pieces of the Earth outermost layer called tectonic plates move and change shape