8th Grade Science EOG Review #3

Use the diagram that shows a river basin with three parts labeled X, Y, and Z to answer the question.

Which option correctly identifies the parts of the river basin labeled X and Y?

• A. X: river; Y: tributary

• B. X: tributary; Y: estuary

• C. X: tributary; Y: river

• D. X: river; Y: estuary

Tags

NGSS.MS-ESS2-4

Use the diagram that shows a river basin with three parts labeled X, Y, and Z to answer the question.

What process is occurring at the location labeled Z?

• A. condensation

• B. evaporation

• C. infiltration

• D. transpiration

Tags

NGSS.MS-ESS2-4

The image shows an aquatic food chain. Which organism(s) will be unaffected if the krill are removed from the aquatic food web?

• A. fish

• B. penguin

• C. phytoplankton

• D. squid

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

A student observes four actions, as described in the table.

Which actions are physical changes?

• A. P and Q

• B. Q and R

• C. R and S

• D. S and P

Tags

NGSS.MS-PS1-2

In 1911, a small population of 25 reindeer was introduced on Saint Paul Island. The graph shows the increase in the population of reindeer on the island between 1911 and 1940 with four lines (W, X, Y, and Z) that represent the estimated reindeer population by 1950.

If the reindeer population overgrazed their food supply in 1940, which line would likely represent the estimated population of reindeer on the island by 1950?

• A. W

• B. X

• C. Y

• D. Z

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

The chemical equation represents the process of photosynthesis.

Which element in the reaction is unbalanced?

• A. carbon

• B. hydrogen

• C. oxygen

• D. sunlight

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which are sources of freshwater on Earth’s surface?

• A. atmosphere, rivers, swamps, soil, and living things

• B. aquifers, atmosphere, estuaries, rivers, and soil

• C. rivers, aquifers, swamps, soil, and oceans

• D. oceans, atmosphere, rivers, soil, and living things

Tags

NGSS.MS-ESS2-4

A group of researchers analyzed the water samples from four polluted lakes (P, Q, R, and S) for the presence of four different substances, as shown in the table.

Which lakes’ water samples exceed only one of the EPA’s maximum permissible levels?

• A. Lakes P and Q

• B. Lakes Q and S

• C. Lakes Q and R

• D. Lakes P and S

Tags

NGSS.MS-PS1-2

A researcher analyzes the water in a stream and observes that the water contains many snails, crayfish, shrimp, caddisflies, mayflies, and stoneflies. These organisms are invertebrates that are used as bioindicators for bodies of water.

What can be concluded correctly about the water in the stream?

• A. The presence of any living organisms indicates the water is safe to drink.

• B. The presence of many different types of invertebrates indicates the water is polluted.

• C. The presence of insects indicates that decomposition is taking place in the water.

• D. The presence of a variety of invertebrates indicates that the water is suitable for aquatic life.

Tags

NGSS.MS-LS2-4

Examine the diagram of a food web.

A small population of eagles is introduced in the food web. The eagles feed on mice and reproduce at high rates. What is the most likely consequence of the introduction of eagles in the food web?

• A. The eagles will coexist with the hawks.

• B. The hawks will prey on grasshoppers.

• C. The eagles will compete with the hawks.

• D. The hawks will establish a mutualistic relationship with mice.

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

NGSS.MS-LS2-2