States of Matter
What is the name of the change when a liquid becomes a solid?
freezing
What is the state of matter that has no definite shape or size?
gas
What is the state of matter with the weakest force of attraction?
gas
Why does diffusion occur much quicker through gases than through liquids
gases have more energy, and there are more spaces between the particles
What eventually happens to a gas if its pressure is increased?
It condenses
What eventually happens if energy is continually removed from a liquid?
It freezes
Which theory describes the arrangement and movement of particles in solids, liquids and gases?
Kinetic Theory
In which state of matter are the particles mostly touching but arranged in a random way?
Liquid
What is the name of the change when a liquid becomes a gas?
evaporation
Describe how the particles in a liquid move
the particles are held close to each other but they are now free to move.
Describe how the particles in a gas move
the particles move fast in random directions
In which state of matter do the particles have the most energy?
Gas
Which of the following will sublime at room temperature and pressure?
Solid carbon dioxide (dry ice)
What are the three states of matter?
Solids, Liquids & Gases
Why do liquids flow?
The particles are free to move
Why can liquids not be compressed easily?
The particles in a liquid are closely packed and have no space to move into
Why do solids have a fixed shape?
The particles in a solid are fixed in place in a regular arrangement
What is condensing?
When a gas becomes a liquid
What is evaporating?
When a liquid becomes a gas
What is freezing?
When a liquid becomes a solid
What is sublimation?
When a solid turns into a gas
What is melting?
When a solid turns into a liquid
What is the name of the change when a gas becomes a liquid?
condensation
What is the name of the change when a solid becomes a liquid?
melting
What is the state of matter with the strongest force of attraction?
solid
What is the name of the change when a solid becomes a gas?
sublimation
What are the forces of attraction like in a solid?
the forces of attraction are strong, which holds them together
What are the forces of attraction like in a gas?
the forces of attraction are very weak so they are far apart and free to move
What are the forces of attraction like in a liquid?
the forces of attraction are weak, however they still stick closely together
What factors affect how strong the forces are?
the material, the temperature, & the pressure
How are the particles in a solid arranged?
they are fixed in place, this forms a very regular lattice arrangement
Describe how the particles in a solid move
they cannot move from one place to another