8th Sci Released Items 2

Which is classified as an element?

• carbon dioxide

• iron

• vinegar

• water

Which best describes the sequence of the elements in Period 5 of the periodic table?

• highly reactive gases, relatively nonreactive metals, metalloids, very non-reactive gases, nonreactive nonmetals

• highly reactive metals, relatively non-reactive metals, metalloids, reactive nonmetals, nonreactive gases

• non-reactive gases, metalloids, nonreactive metals, highly reactive metals, highly reactive gases

• non-reactive gases, non-reactive metals, highly reactive metals, metalloids, reactive nonmetals, reactive gases

Which statement is true about a chemical reaction?

• The physical states of the atoms in the reactants determine the products

• Some of the atoms in the reactants will be a part of the products.

• The number of atoms in the reactants determines the products.

• All of the atoms in the reactants will be part of the products.

Tags

NGSS.MS-PS1-5

Which are most responsible for creating acid rain pollution?

• nuclear power plants

• coal-burning power plants

• hydroelectric power plants

• wood-burning power plants

The table shows the estimated energy production (in quadrillions of BTUs) from fossil fuels over a 20-year period.

Which conclusion is BEST supported by the data?

• Dependency on oil has increased, therefore energy production from oil is increasing.

• Dependency on oil has increased, therefore energy production from natural gas is decreasing.

• Dependency on coal has increaed, therefore energy production from coal is increasing.

• Dependency on coal has increased, therefore energy production from natural gas is decreasing.

Tags

NGSS.MS-ESS3-1

NGSS.MS-ESS3-4

Which BEST explains why all of the Earth's freshwater is not available for human use?

• Most of Earth's freshwater is only in lakes

• Most of Earth's freshwater is underground.

• Most of Earth's freshwater is still in the water cycle.

• Most of Earth's freshwater is frozen water.

How can upwellings improve fishing for ocean fishermen?

• They cause the ocean water to get warmer.

• They cause ocean currents to remain calm.

• They bring nutrients from the cold, deep ocean waters.

• They bring ocean currents from the equator.

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-4

If a lake has excess levels of phosphates and nitrates in its water, what will most likely result?

• The temperature of the lake water will decrease.

• The turbidity levels of the lake will decrease

• The dissolved-oxygen levels in the lake will increase.

• The growth of algae in the lake will increase.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Which is the most accurate method scientists use to predict the age of the Earth?

• relative dating of rock layers

• radioactive dating of rocks

• comparing the ages of different fossils

• investigating core samples from the Artic

Tags

NGSS.HS-ESS1-6

NGSS.HS-PS1-8

Which is the best reason for scientists to study ice cores obtained from Earth's ice caps?

• to evaluate potential oil drilling sites

• to study the quality of water stored in glaciers

• to determine the rate of melting in polar regions

• to study past climates by analyzing trapped gases and particles

Tags

NGSS.HS-ESS3-5