End of Year Science Review

Examine the information showing the aquatic fish and plant species found in a lake and their pH tolerances. A researcher measures the pH of the lake water as 5.3. Which conclusion correctly describes the effect on aquatic species if additional acidic water is released into the lake?

• The pH of the lake will increase, making the water less suitable for the survival of trout.

• The pH of the lake will increase, making the water more suitable for the survival of water lilies.

• The pH of the lake will decrease, making the water more suitable for the survival of salmon.

• The pH of the lake will decrease, making the water less suitable for the survival of plankton.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

A student makes a model to demonstrate a functioning ecosystem by filling a glass jar with water and adding two goldfish and two butterfly fish. The student’s teacher says that the model could be improved.

What should the student do to improve the model?

• A. The student should add more goldfish or butterfly fish to the jar.

• B. The student should keep the glass jar in sunlight.

• C. The student should change the water of the jar daily.

• D. The student should add small rocks and aquatic plants to the jar.

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6

Examine the map that shows the river basins of North Carolina and a star that indicates the location of a farm with runoff containing excess nitrates and phosphates. Which city(ies) need(s) to be concerned with potential algal blooms caused by the excess nitrate and phosphate pollution, and why?

• Fayetteville; the pollution will only affect the city that is closest to the source.

• Raleigh and New Bern; the pollution will travel both upstream and downstream within the river basin.

• New Bern; the pollution will only travel downstream within the river basin.

• Fayetteville and Wilmington; the pollution will travel directly south regardless of the river basin in which the source is found.

Tags

NGSS.MS-LS2-3

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

• fish

• penguin

• phytoplankton

• squid

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

NGSS.MS-LS2-3

Which actions are physical changes?

• P and Q

• Q and R

• R and S

• S and P

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-LS1-6

NGSS.MS-PS1-5

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

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?

• The eagles will coexist with the hawks.

• The hawks will prey on grasshoppers.

• The eagles will compete with the hawks.

• The hawks will establish a mutualistic relationship with mice.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

NGSS.MS-LS2-2

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

• X: river; Y: tributary

• X: tributary; Y: estuary

• X: tributary; Y: river

• X: river; Y: estuary

What process is occurring at the location labeled Z?

• condensation

• evaporation

• infiltration

• transpiration

Tags

NGSS.MS-ESS2-4