8.P.1.1&1.2 EOG questions

Which is a compound?

• sodium

• sugar

• nitrogen

• air

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8.P.1.1

Which is classified as an element?

• carbon dioxide

• iron

• vinegar

• water

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8.P.1.1

Which is the best example of a pure substance?

• peanuts

• milk

• gold

• air

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8.P.1.1

Which of the following substances is an element?

• NaCl

• Mg

• KBr

• CH4

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8.P.1.1

Of the following, which is the best way of deciding if a newly-formed substance created by combining two other substances together is a mixture or a compound?

• determining whether the newly-formed substance is heterogenous throughout

• determining whether one of the original substances disappears into the other

• determining whether you can separate the newly-formed substance by physical means such as filtration, sifting, or evaporation

• determining whether the newly-formed substance has the potential to be flammable

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8.P.1.1

In a particular chemical reaction, two elements chemically bond. For example, Iron + Oxygen = Rust (Iron Oxide)

The result of this reaction is a new-

• element with the same type of atoms as the original elements used to make it.

• compound with the same properties as the original elements used to make it.

• compound with properties different from the original elements used to make it.

• atom with similar properties as the atoms used to make it.

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8.P.1.1

Which state of matter zips and zooms in any direction, filling the entire container?

• gas

• liquid

• solid

• metal

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8.P.1.1

Which particle diagram represents one pure substance only?

• Diagram A

• Diagram B

• Diagram C

• Diagram D

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8.P.1.1

The table shows the chemical and physical properties of several materials. Which of the following materials is MOST SIMILAR to the materials in the chart?

• iron (Fe)

• Argon (Ar)

• silver (Ag)

• calcium (Ca)

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8.P.1.1

How are elements and compounds different?

• A compound is a combination of two or more types of matter, an element is one type.

• Compounds are represented by chemical symbols of one letter, elements by two.

• There are an infinite number of elements, but a limited number of compounds.

• Elements are always larger units of matter, and compounds are smaller.

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8.P.1.1