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Physical Science Chapter 6 States of Matter

The three states of matter commonly found on Earth are ___, liquid, and solid. gas
Stars and lightning are examples of _______ (hint: a fourth state of matter), which exists as a gas (hint: a state of matter) that has an electrical charge. plasma
The motion of particles is called ____ motion, because particles move in any direction and can have different speeds. Colliding particles can change speed and direction. random
Moving particles are attracted to each other due to their ______ force. attractive
As particles move closer to each other, their attractive force ____; as particles move farther apart, their attractive force decreases. increases
A ____ is matter that has a fixed shape and a fixed volume. solid
Strong attractive forces in a solid keep ____ close together. particles
Because each particle moves only a short distance back and forth between neighboring particles, the shape and ____ of the solid remain fixed. volume
Liquid is matter with a fixed volume but not a fixed ___. shape
The particles in a liquid are farther apart, and their attractive ___ is less than in a solid. force
Particles in a liquid move ___ freely than particles in a solid. more
A ___ is matter with no fixed volume and no fixed shape. gas
The particles in a gas are far apart and have little ___ force. attractive
Particles in a gas move freely to fill whatever ___ they are in. container
Particles in motion have ___ ___; moving objects such as a ball have kinetic energy, too. kinetic energy
_____ is a measure of the average kinetic energy of all particles in an object. Temperature
Warmer objects have a ___ average kinetic energy and therefore have a higher temperature than cooler objects. higher
A ___ is used to measure temperature. thermometer
Particles in the thermometer’s gauge increase their ___ when heated and start moving farther apart, causing the liquid in the thermometer to rise. speed
The total energy of the particles of a substance is its ___ energy. thermal
Thermal energy includes the kinetic energy and ___ energy of a substance’s particles. potential
A substance’s liquid state has more thermal energy than its ___ state. solid
A substance’s ___ state has more thermal energy than its liquid or solid state. gas
Thermal energy can be ___ to or removed from a substance. added
When the kinetic energy of a material’s particles increases, the ___ of the material increases. temperature
When the potential energy of a material changes, the material’s ___ of matter changes. state
The ___ ___ of a material is the temperature at which it changes from a solid to a liquid. melting point
The ___ ___ of a material is the temperature at which material changes from a liquid to a solid. freezing point
Freezing and melting are ___ processes. Freezing involves removing thermal energy from a substance, while melting involves adding thermal energy. opposite
The change from a liquid to a gas state is called ____. vaporization
Vaporization that occurs within a liquid is called ___. boiling
The ___ ___ is the temperature at which a liquid changes to a gas. boiling point
Vaporization at the surface of a liquid is ___. evaporation
Evaporation can occur at temperatures below the ____ point. boiling
The boiling point of a liquid depends on the ___ exerted on the liquid. The higher the pressure on the liquid, the higher the boiling point is. pressure
The state change of a material from a gas to a liquid is called ___. condensation
___ and condensation are opposite processes, though they occur at the same temperature. Vaporization
When ice is changed to liquid water, the temperature of the ice rises to the ____ point of ice. At the melting point, the temperature remains the same as thermal energy is added until all the ice becomes liquid. melting
When liquid water is heated, its temperature increases until it reaches its ____ point. There, the water temperature remains the same until all of the liquid water changes state to become water vapor. boiling
Changes in state can be ____. reversed
___ is the change of a solid to a gas without going through the liquid state. Sublimation
___ is the change in state of a gas to a solid without going through the liquid state. Deposition
For a material to change from one state of matter to another, ___ ___ must be added to or removed from the material. thermal energy
Created by: jnosik