NC Science EOG Practice 2

Which source of water pollution includes oil and gasoline discharge from automobiles and storm sewer drainage?

• agriculture

• bacteria

• sedimentation

• urban runoff

This chart describes an experiment using a sample of water and three solids made of different substances.

* three different solids were dropped into a wide beaker of water.

*Solid 1 sinks half way down in the water and remains suspended. Solid 2 sinks to the bottom. Solid 3 floats to the top of the water.

Which property of water is being tested?

• solubility

• cohesion

• polarity

• buoyancy

Which best explains the importance of dissolved gases in the ocean?

• They help control pollution.

• They help provide oxygen for aquatic animals.

• They help maintain a constant water temperature.

• They help maintain constant levels of salinity.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Which best describes a bioindicator?

• a species that has a short life span

• a species that depends on specific conditions to survive

• a species that can adapt to a variety of conditions

• a species that has been introduced into an ecosystem

What characteristic of aluminum allows it to be made into aluminum foil?

• It is dense.

• It is malleable.

• It is magnetic.

• It is soluble.

Which pure substance is composed of more than one element?

• Water

• gold

• Sodium

• Carbon

Tags

NGSS.MS-PS1-1

After a chemical reaction occurs in an open test tube, measurements indicate that the mass of the reactants is greater than the mass of the products remaining in the test tube. What most likely explains the measurements?

• A gas was produced.

• A solid was produced.

• The salinity of the reactants was too high.

• The temperature of the reactants was too low.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which factor best explains why some people will develop cancer and others will not after being exposed to the same high levels of a harmful chemical?

• concentration of the chemical

• potency of the chemical

• individual susceptibility to the chemical

• individual exposure to the chemical

Tags

NGSS.MS-LS4-4

A layer of marine fossils is discovered in a desert environment. Which hypothesis best explains the discovery?

• The area was once covered with water.

• Volcanic activity once occurred in the area.

• A catastrophic event occurred in the area.

• Erosion turned most of the limestone in the area into sand.

Tags

NGSS.MS-ESS2-2

Fossils of warm-weather plants were found on an island in the Arctic Ocean. What can best be concluded from this discovery?

• Spores of plants drifted by air currents to the island.

• Ocean currents carried the plants to the island.

• The island drifted from a tropical region to its present location.

• Seeds of plants have been carried to the island by migratory birds.

Tags

NGSS.MS-ESS2-3

NGSS.MS-LS4-1