What are the phases of matter in order, from the phase with the slowest molecular movement to the phase with the fastest molecular movement.
solid, liquid, gas
100
The name for a mixture in which all samples are made up of the same proportion of matter is _____________.
homogeneous
100
Anything that has mass and takes up space.
matter
100
An instrument used to measure temperature.
thermometer
100
The smallest particles of an element is called a(n)____________________.
atom
200
Which phase of matter is most common in the universe?
plasma
200
A pure substance made of two or more elements that are chemically joined and cannot be separated by physical means is called a __________________.
compound
200
A mixture that contains more than one type of matter and is the same throughout.
homogeneous
200
The lowest possible temperature.
absolute zero
200
The irregular jerky motion of dust particles in water that may be observed under a microscope was named in honor of __________________
Botanist Robert Brown
300
At a constant temperature and pressure, liquids retain their _____________.(volume, shape, size)
volume
300
A ____________________ is made of more than one kind of element and cannot be separated by physical means.
compound
300
The temperature at which water changes to steam is known as the _________________.
boiling point
300
The temperature scale on which water freezes at 32 degrees and boils at 212 degrees.
Fahrenheit
300
What occurs when a gas changes to a liquid. (Think about the lid of a pot when you boil water)
condensation
400
In which state of matter do the molecules move around freely. This state of matter also flows, does not hold its volume, and can expand or contract to fill a container.
gas
400
The smallest particle of an element that retains the identity of the element is an ________________.
atom
400
What occurs when a liquid changes to a gas? Example: When a puddle dries up.
evaporation
400
32 degrees Fahrenheit, 0 degrees Celsius is called the ________________ of water.
freezing point
400
The temperature at which a substance changes from a solid to a liquid.
melting point
500
In which state of matter are intermolecular forces the strongest?
solid
500
The name for a mixture in which all samples are made up of different proportions of matter throughout.
heterogeneous
500
The process during which a substance changes from a solid directly to a gas without becoming a liquid is known as ________________.
sublimation
500
What does temperature measure?
The kinetic energy of particles.
500
The phase of matter that holds its shape without flowing is the ______________ phase.