A
Which phase change occurs when ice turns into liquid water?
A. Condensation
B. Evaporation
C.Freezing
D. Melting
D. Melting
What is the process called when liquid water changes into water vapor?
A. Condensation
B. Deposition
C. Evaporation
D. Freezing
C. Evaporation
Which phase change happens when water vapor becomes liquid water?
A. Condensation
B. Ionization
C. Melting
D. Sublimation
A. Condensation
What is the process in which liquid water changes into solid ice?
A. Deposition
B. Freezing
C. Melting
D. Recombination
B. Freezing
Frost forming on grass during a cold morning is an example of:
A. Deposition
B. Evaporation
C. Ionization
D. Melting
A. Deposition
Which pair of phase changes are opposite processes?
A. Deposition and Melting
B. Ionization and Evaporation
C. Melting and Freezing
D. Sublimation and Evaporation
C. Melting and Freezing
During which phase change do particles lose enough energy to become a solid?
A. Evaporation
B. Freezing
C. Ionization
D. Melting
B. Freezing
Which phase change absorbs heat from the surroundings?
A. Condensation
B. Deposition
C. Freezing
D. Melting
D. Melting
Which phase change occurs when water droplets form on the outside of a cold glass?
A. Condensation
B. Evaporation
C. Freezing
D. Recombination
A. Condensation
Dry ice changes directly from a solid into carbon dioxide gas. This process is called:
A. Condensation
B. Freezing
C. Melting
D. Sublimation
D. Sublimation
Which process changes a gas directly into a solid without passing through the liquid state?
Deposition
Which statement best describes ionization?
A. Gas particles become ions.
B. Liquid changes into gas.
C. Gas changes into liquid.
D. Solid changes into liquid.
A. Gas particles become ions.
Recombination occurs when:
A. Ions become neutral atoms.
B. Solids become liquids.
C. Liquids become gases.
D. Gases become solids.
A. Ions become neutral atoms.
Which phase change releases heat to the surroundings?
A. Condensation
B. Evaporation
C. Melting
D. Sublimation
A. Condensation
Which sequence correctly shows water changing from solid to gas through two phase changes?
A. Deposition → Melting
B. Freezing → Condensation
C. Melting → Evaporation
D. Sublimation → Freezing
C. Melting → Evaporation
A substance changes from plasma back into a neutral gas after gaining electrons. This process is known as:
Recombination
Which pair of phase changes are both endothermic (absorb heat)?
A. Deposition and Recombination
B. Freezing and Condensation
C. Freezing and Deposition
D. Melting and Sublimation
D. Melting and Sublimation
Which phase change requires the greatest increase in particle energy among the following?
A. Condensation
B. Deposition
C. Freezing
D. Ionization
D. Ionization
Snowflakes form when water vapor changes directly into ice crystals. Which process is responsible?
Deposition
A scientist observes that a gas becomes electrically charged because its atoms lose electrons. Which phase change is taking place?
A. Condensation
B. Deposition
C. Ionization
D. Recombination
C. Ionization
Fireflies produce light to communicate with other fireflies. This light is produced by a chemical reaction inside their bodies called:
Bioluminescence
Which of the following best explains why a glow stick remains cool while producing light?
A. It produces light through incandescence.
B. It releases heat as its main product.
C. It produces light through chemiluminescence.
D. It undergoes ionization.
C. It produces light through chemiluminescence.
Which situation demonstrates incandescence?
A. A glow stick glowing during a concert.
B. A firefly producing light.
C. A heated tungsten filament in an incandescent bulb emitting light.
D. Ocean plankton glowing at night.
C. A heated tungsten filament in an incandescent bulb emitting light.
Which of the following is an exothermic process?
A. Ionization of a gas.
B. Melting candle wax.
C. Sublimation of dry ice.
D. Water vapor condensing into liquid water.
D. Water vapor condensing into liquid water.
Which process below is endothermic?
A. Ice melting into liquid water.
B. Steam condensing into liquid water.
C. Water freezing into ice.
D. Water vapor forming frost.
A. Ice melting into liquid water.