Changes of State Test Prep
What is condensation
Gas to liquid
On a hot day, a puddle dries up. Which statement describing this event is true?
The water in the puddle evaporates into water vapor.
why does water that is frozen in an ice cube tray stay in the shape of a cub when it is taken out of the tray?
The water particles become locked in place
Which statement is true of the carbon atoms that make up a diamond (this is a solid)?
They are always vibrating in place.
On a cool morning, a thick fog forms. Through which process does the fog form?
Water vapor in the air condenses into liquid drops.
What happens to the temperature of a sample of matter as it changes from a liquid to a gas?
Temperature remains constant.
At which temperature does ice melt into liquid water?
0 degrees Celsius
What is the boiling point of water?
100 degrees C
Describe a liquid
A state of matter that has no definite shape but has a definite volume.
Marissa blows up balloons for a party. She decides how big or small to make each balloon. Why does the air she blows into each balloon take up all the space inside the balloon?
Air is a gas and so fills its container, the balloon, completely.
Frost forms when water vapor (gas) changes directly to ice (solid) in a process called deposition. If you were to model the water particles before and after deposition, how would they compare?
Before deposition, the particles move quickly in all directions; after deposition, the particles vibrate in place
Nora notices water droplets (from a gas to a liquid) on the grass in the morning. It did not rain during the night. Which is true about this change of state?
Energy was removed from the water particles, resulting in condensation.
what is evaporation
Liquid to gas
Dry ice is solid carbon dioxide. At room temperature, it changes directly into a gas. A model of which of the following would describe this change?
Sublimation occurs due to an increase in the kinetic energy of the particles.
What happens to the particles of a sample of matter as its temperature increases (boiling?
The particles move faster.
Which of the following happens when the substance (solid) changes state to the substance (liquid)?
The particles vibrate faster.
Which changes of state result in a decrease in the kinetic energy of the particles?
deposition, freezing, condensation
Which process can occur when the particles in a sample of matter experience an increase in kinetic energy (from a liquid to a gas)?
evaporation
Which state of matter will take both the volume and shape of the container that holds it?
gas
What is deposition?
gas to solid
What is sublimation
solid to gas
What does each of the states of matter have in common?
the particles in each are in constant motion
