Chemistry Quiz 1 Practice

Chemists contribute to the growth of food by all of the following except

• developing new fertilizers

• causing soil erosion

• creating new pesticides

• making new soil supplements

There is often overlap between the disciplines of biochemistry and

• inorganic chemistry

• analytical chemistry

• organic chemistry

• physical chemistry

A scientific theory has been

• repeatedly tested and shown to be true

• repeatedly tested without clear conclusions

• tested once and accepted

• poorly accepted by other scientists

The dependent variable

• does not change as the temperature increases

• will change as the independent variable changes

• never changes

• is varied in the experiment to see how it influences the results

One of the following is not a physical property of iron.

• malleability

• magnetism

• rusting

• color

A gas sample will NOT demonstrate one of the following properties

• has a definite volume

• has no definite shape

• has a definite mass

• be easily compressed

One of the following statements is not true of a physical change

• the shape is unchanged

• the chemical composition is unchanged

• the identity of the material is unchanged

• the reactivity is unchanged

Sodium chloride is changed to metallic sodium and chlorine gas. This process represents a

• physical change

• chemical change

• reversible change

• temporary change

Chicken noodle soup is a __________ mixture.

• homogeneous

• heterogeneous

• homogenized

• heterophilic

Filtration separates

• two or more liquid phases

• solids in a heterogeneous mixture

• solids from liquids in a heterogeneous mixture

• solids from liquids in a homogeneous mixture