8th Grade Science - EOG Review 2025

Which of theses provides the best evidence that an environmental change has occurred?

• a freshwater lake in the mountains

• marine fossils in a freshwater lake

• saltwater clams in the ocean

• a sandy beach next to the ocean

Tags

NGSS.MS-LS2-4

Which method would be best for scientists to use to determine the absolute age of a Precambrian igneous rock?

• index fossils

• law of superposition

• radiometric dating

• law of original horizontality

Paleontologists are scientists who study evidence of past life on Earth. Which method do paleontologists most likely use to determine the forms of life that existed millions of years ago?

• examine current species of plants and animals

• research past species in the library

• interview older scientists

• examine fossil records

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

In what type of rock would a geologist most likely find evidence of ancient life?

• sedimentary

• foliated

• metamorphic

• volcanic

Tags

NGSS.MS-ESS2-3

NGSS.MS-LS4-1

A fossil discovered in Colorado dates from the early Mesozoic era. A year later a similar fossil is found in Wyoming that also dates from the early Mesozoic era. These two organisms mot likely lived in

• the same environment at about the same time

• the same environment at different times

• different environments at about the same time

• different environments at different times

Tags

NGSS.MS-ESS2-3

NGSS.MS-LS4-1

Which may cause scientists to be concerned about the quality of lake water?

• low levels of salt

• low levels of arsenic

• high levels of oxygen

• high levels of nitrates

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Which has the greatest long-term impact on local water availability?

• runoff

• climate

• pollution

Tags

NGSS.MS-ESS2-4

NGSS.MS-ESS2-6

Which type of water reservoir contains the largest volume of fresh water?

• lakes

• rivers

• ice sheets

• aquifers

Tags

NGSS.MS-ESS3-1

A recreational lake experiences eutrophication because of excess nutrients. Based on this information, how would the recreational lake most likely appear?

• clear and blue

• oily and greasy

• murky and full of algae

• orange and rust colored

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Which is the main source of dissolved oxygen in the ocean?

• underwater earthquakes

• decay of living organisms

• animals that live near the surface

• plants and algae that live near the surface

Tags

NGSS.MS-LS1-6