What I Know

What are the two (2) classes of matter?

• atom and molecule

• element and compound

• plant and animal cells

• substance and mixture

Which is true regarding water?

• compound of element

• element of gases

• mixture of gases

• substances of gases

What is the difference between a substance and a mixture?

• Substance can be separated while mixture cannot be separated.

• Substance has many components while mixture has one only.

• Substance is heterogeneous while mixture is homogeneous.

• Substance is pure while mixture is impure.

To separate salt from water in a seawater mixture, what process is used?

• condensation

• distillation

• evaporation

• filtration

Which of the following is a property of mixture?

• It has a definite composition.

• It consists of a single phase.

• It has a heterogeneous composition.

• It can be chemically separated into its components.

Which of the following is a physical appearance of a substance?

• complicated

• homogeneous

• heterogeneous

• non-uniform

Which one is the best way to determine whether an unknown sample is a

substance or a mixture?

• Knowing its density

• Tasting the given sample

• Observing its physical appearance

• Testing its melting and boiling point

Which is NOT a technique to separate components of mixture?

• condensation

• distillation

• evaporation

• .

  filtration

Which of the following is a heterogeneous mixture?

• air

• oil in water

• stainless steel

• soft drink

What is/are true for substance and mixture? I. Pure substance melts completely.

II. Pure substance has a varying boiling point.

III. Mixture does not melt completely.

IV. Mixture has a fixed boiling point.

• I and II only

• I and III only

• II and IV only

• I and IV only