Science Test 2 8th grade (8.E.2. and 8.L.4. study guide) Flashcards
Determining the age of rocks or fossils within the superposition of sedimentary layers
Relative dating
Using the radioactive decay of carbon isotopes within a fossil sample to determine its age
Carbon-14 dating
The pushing up of rock laters is called uplift
True
What rock is formed by molten magma?
Igneous rock
The type of fossil that can be used to determine a rock layer’s relative age
Index fossil
Strike Slip is when opposing tectonic plates move away from each other horizontally
True
Ice cores are…
Atmospheric gases that are frozen in precipitation thousands of years ago
A type of fossil that is an outline of an organism
Mold fossil
When an organism is trapped inside of mummified ice, tree sap, deserts, or bogs
Preserved fossil
Trace fossils can be fossilized animal tracks
True
The era that the earth was formed in
Pre-Cambrian
The first forms of life on Earth were complex
False
When massive, diverse, and complex life forms evolved
The Cambrian explosion
The end of the Paleozoic and the start of the Mesozoic
The Permian Extinction
Mutation and natural selection is evolution
True
The era in which dinosaurs ruled the planet
Mesozoic
Systematic grouping of life forms, Naming and classifying all vertebrates, Animal, chordate, mammal, primate, hominid, sapiens are examples of…
Taxonomy
If they evolved from a common ancestor with a skull and backbone, may look very similar at embryonic stages of development, and they have some homologous structures means they…
The organism has the same taxonomic classification as vertebrates
Degree to a phenotype or genotype increases likelihood of the production of the reproduction and survival of a species
Reproductive fitness
Pangea is…
A giant supercontinent 250 million years ago, spread apart, eventually changed climates for similar species, and is evidence of how continental drift led to separate evolutionary lines
