WorksheetsGrade 8: Quiz #1
Total questions: 15
Worksheet time: 8mins
Melting is a change of phase from solid to liquid. Which of the following situations shows melting?
a mothball that disappears after several weeks
an ice cream that turns into liquid
water forming outside the soda can
burning plastic
When a substance changes from gas to liquid, it is called condensation. Which of the examples below indicates condensation?
when clothes become dry after hanging them under the heat of the sun
when dew forms on the grass in the morning
when water boils and turns into steam
when ice melts at room temperature
The process of changing solid to gas without passing through its liquid form is called sublimation. Which of the following is an example of sublimation?
when dry ice turns directly to gas
adding enormous energy to gas
water freezes into ice cubes
water vapor that freezes
What would be the phase changes for A and B respectively?
condensation, evaporation
condensation, freezing
melting, condensation
melting, evaporating
When you spill an isopropyl alcohol, you observe that it quickly disappears. What phase change is described?
condensation
sublimation
evaporation
boiling
Table salt dissolves in water.
P
C
Silver tarnishes.
P
C
Heat changes H2O to steam.
P
C
Baking soda reacts to vinegar.
P
C
Iron rusts.
P
C
Alcohol evaporates.
P
C
Milk sours.
P
C
Sugar dissolves in water.
P
C
Wood rots.
P
C
Food is digested.
P
C
