Science Test 2 8th grade (8.E.2. and 8.L.4. study guide)

Question 1

Determining the age of rocks or fossils within the superposition of sedimentary layers

Answer 1

Relative dating

Question 2

Using the radioactive decay of carbon isotopes within a fossil sample to determine its age

Answer 2

Carbon-14 dating

Question 3

The pushing up of rock laters is called uplift

Answer 3

True

Question 4

What rock is formed by molten magma?

Answer 4

Igneous rock

Question 5

The type of fossil that can be used to determine a rock layer’s relative age

Answer 5

Index fossil

Question 6

Strike Slip is when opposing tectonic plates move away from each other horizontally

Answer 6

True

Question 7

Ice cores are…

Answer 7

Atmospheric gases that are frozen in precipitation thousands of years ago

Question 8

A type of fossil that is an outline of an organism

Answer 8

Mold fossil

Question 9

When an organism is trapped inside of mummified ice, tree sap, deserts, or bogs

Answer 9

Preserved fossil

Question 10

Trace fossils can be fossilized animal tracks

Answer 10

True

Question 11

The era that the earth was formed in

Answer 11

Pre-Cambrian

Question 12

The first forms of life on Earth were complex

Answer 12

False

Question 13

When massive, diverse, and complex life forms evolved

Answer 13

The Cambrian explosion

Question 14

The end of the Paleozoic and the start of the Mesozoic

Answer 14

The Permian Extinction

Question 15

Mutation and natural selection is evolution

Answer 15

True

Question 16

The era in which dinosaurs ruled the planet

Answer 16

Mesozoic

Question 17

Systematic grouping of life forms, Naming and classifying all vertebrates, Animal, chordate, mammal, primate, hominid, sapiens are examples of…

Answer 17

Taxonomy

Question 18

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…

Answer 18

The organism has the same taxonomic classification as vertebrates

Question 19

Degree to a phenotype or genotype increases likelihood of the production of the reproduction and survival of a species

Answer 19

Reproductive fitness

Question 20

Pangea is…

Answer 20

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