STAAR Review Energy and Matter

Which pair of elements are nonmetals and gases at room temperature and normal atmospheric pressure?

• Flourine, F, and chlorine, Cl

• Boron, B, and aluminum, Al

• Hydrogen, H, and cesium, Cs

• Cobalt, Co, and nickel, Ni

How many neutrons are in the nucleus of a potassium atom with a mass number of 39?

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NGSS.MS-PS1-1

Which statements correctly compare metals and nonmetals?

• Metals tend to be good conductors or thermal energy. Nonmetals tend to be good insulators of thermal energy.

• Metals are dull and brittle. Nonmetals are shiny and malleable.

• Metals are good insulators of electricity. Nonmetals tend to be good conductors of electricity.

• Metals cannot be stretched into thin wires. Nonmetals can be stretched into thin wires.

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NGSS.MS-PS3-3

The names and chemical formulas of four substances are shown in the chart. Which substance listed in the chart is made up of the most atoms?

• Carbonic acid

• Nitric acid

• Phosphoric acid

• Sulfuric acid

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NGSS.MS-PS1-1

• gold

• iron

• silver

• tin

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NGSS.MS-PS1-2

• Process 1

• Process 2

• Process 3

• Process 4

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NGSS.MS-LS2-3

Fox squirrels are common in Texas. Fox squirrels primarily eat acorns and nuts from trees but also eat insects. Some predators of fox squirrels include owls, snakes and bobcats.

Which diagram best represents how energy would flow to and from fox squirrel?

• A

• B

• C

• D

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NGSS.MS-LS2-3

Which pair of elements has reactivity that is similar to chlorine, Cl?

• Flourine F, and argon, Ar

• Flourine, F, and iodine, I

• Sulfur, S, and bromine, Br

• Sulfer, S, and argon, Ar

• The mass increases.

• The mass decreases.

• The mass remains constant.

• The mass first decreases and then increases.

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

One of the properties that makes copper, Cu useful for household wiring is its ability to conduct electricity. Which other element is most likely to conduct electricity.

• Gold, Au

• Radon, Rn

• Bromine, Br

• Nitrogen, N

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NGSS.HS-PS1-1