Test 2 Review Matter S8p1a,c,d

Which of these is a mixture?

• Milk

• Salt

• Sulfuric Acid

• Carbon Dioxide

Which of these is not considered a pure substance?

• An atom

• mixture

• Element

• compound

Sherry combined water, lemon juice, and sugar in a pitcher. Sherry has made a

• new compound

• pure substance

• homogeneous mixture

• heterogeneous mixture

While elements and compounds can both be classified as pure substances because they have distinct properties and composition, __________ cannot be decomposed further.

• Compounds

• Elements

• Formulas

• Molecules

One difference between mixtures and pure substances is that

• mixtures can be physically separated.

• mixtures are made of one type of atom.

• pure substances have no chemical bonds.

• pure substances can be physically separated.

Which of these could also be classified as a chemical property of matter?

• odor

• melting point

• molecule size

• generation of heat

Tags

NGSS.MS-PS1-5

Silver is a white metal and is an excellent conductor of heat and electricity. The density of silver is 10.49 g/cm³. Silver does not react with water but it does react with nitric acid. Silver tarnishes when exposed to air or light.

• density

• tarnishes

• reacts with nitric acid

• does not react with water

Tags

NGSS.MS-PS1-2

Which is a physical change?

• Burning paper

• Silver tarnishing

• cooking a muffin

• melting an ice cube

Tags

NGSS.MS-PS1-4

Which is evidence that a chemical reaction has occurred?

• A precipitate forms in a milk vinegar reaction

• a phase change occurs

• red and yellow paint mix to produce a different color

• a pot of water reaches a boiling point

Tags

NGSS.MS-PS1-2

Which of these is a physical property?

• freezing point

• flammability

• toxicity

• decomposition