Chemistry Quiz #1 Review

Which gives an accurate description of the varying states of matter?

• Solids are tightly packed with fast moving atoms whereas gases are loosely packed with slow moving atoms

• Solids are loosely packed with fast moving atoms whereas gases are tightly packed with slow moving atoms

• Solids are tightly packed with slow moving atoms whereas gases are loosely packed with fast moving atoms

• Solids are loosely packed with slow moving atoms whereas gases are tightly packed with fast moving atoms

Homogeneous mixtures are best classified as

• Mixtures that are composed of many differently sized parts

• Mixtures that are uniform throughout

• Mixtures that have changed chemical properties

• Mixtures that can never be separated

Which best describes the relationship of elements and compounds?

• Compounds are made up of varying elements

• Elements are made up of varying compounds

• Sometimes elements make up compounds and sometimes compounds make up elements

• There is no relationship between elements and compounds

Which is the best example of a pure substance?

• Silver

• Salt water

• Air

• Salad dressing

Which is the best example of a heterogeneous mixture?

• Silver

• Salt water

• Air

• Salad dressing

Which is the best example of a chemical property?

• Ability to react with oxygen

• Melting point

• Density

• Color

Density is best defined as

• Amount of mass per unit volume

• An object’s weight

• Ability to react with an acid

• A chemical property

A chemical reaction gives off heat. How can it be classified?

• Basic

• Acidic

• Exothermic

• Endothermic

Which is the best example of a pure substance?

• Silver

• Salt water

• Air

• Salad dressing

An element can be broken down into a simpler substance.

• True

• False