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Matter and Change Unit 1
Terms in this set (46)
Anything that has mass and volume is _________________
solids, liquids, and gases
All of the _______________, __________________, and _____________ that you may encounter in your daily life would be classified as some type of matter.
One uncommon type of matter is called ____________
Matter than can not flow. Definite shape and has definite volume. Strong attractive forces
definite volume but takes the shape of its container flows
does not have a definite volume or shape. No attractive forces when far apart
4th state of matter. Hot ionized gas (electrons stripped from positive nucleus)
High temperature physical state in which atoms lose most of their electrons. Suns, stars, neon, TV
smallest particle of matter, which maintains the chemical identity of the element
a pure substance, made of only one type of atom; cannot be separated unless by using a nuclear reaction
substance made up of two or more different types of atoms; cannot be separated by physical means. chemically combined
are pure substances and always have a fixed composition (chemical formula) and are always homogenous
a combination of two or more kinds of matter that retains its own identity and properties. can be separated into their components by chemical or physical means
solutions - have a uniformed composition, all the same
mixtures are not uniformed
Every substance, whether it is an element or compound, has unique _________________ that distinguishes it from other substances. chemists use the properties to categorize substances or help identify an unknown substance.
A characteristic that can be observed or measured without changing the identity or composition of the substance
change in the physical appearance that does not involve a change in the identity of the substance
- a change in size, shape, or state
- no new substance is formed
melting point; boiling point; color; texture; odor; malleable; ductility; frequency; viscosity; solubility
grinding; cutting; melting; boiling; breaking; dissolving
describes the way matter will change or react to form a new substance
a change in which a substance is converted into a new chemical substance. chemical change is a synonym for chemical reaction
burn; cook; rust; tarnish; decompose; flammable; radioactive; corrosive; oxidizer; combustible; toxic; explosive; pyrophoric
wood rots; pancakes cook; grass grows; milk sours; organisms decompose
evolution of gas; color change; formation of precipitate; temperature change; change in odor
what do you look for during a reaction?
Law of conservation of mass
mass is neither created nor destroyed during a chemical reaction. the mass only changes form. Atoms are rearranged into different substances with new properties
As heat energy is added to a Solid, the temperature rises. Solid becomes a liquid
at some point the temperature will remain _______________, this is when the phase change of melting is occurring.
the solid and liquid phase exist in _______________
When a liquid becomes a solid the process is called solidification or ______________________.
At some point the temperature will remain ______________, this is when the phase change of freezing is occuring.
the temperature at which a substances changes from liquid phase to a solid phase
- Temperature will usually be in kelvin or degrees Celsius
the temperature at which a substance will change from a solid phase to a liquid phase.
temp either kelvin or celsius.
when a gas becomes a liquid. Energy between molecules has decreased enough so the molecules can come close enough together that a bond forms between the molecules
as heat energy is added to a liquid the temperature rises until that point in which the temperature remain constant. heat energy continues to increase until all bonds between the molecules are broken. this is when boiling is occuring
the temperature at which the atmospheric pressure is equal to the vapor pressure (pressure of steam)
pressure of exerted by the vapor
pressure exerted by the atmosphere
phase changes are changes of state such as the change from a liquid to gas, or a solid to liquid, or a gas to liquid
What is phase Change?
What makes one phase different from another?
Particles in a __________.
- far apart, no order
- move freely at ________ speeds.
Particles in a _______________.
- close together, no order, but more ordered than a gas.
- move around/slide around each other.
particles in a _____________.
- tightly packed, ordered
- vibrate, but do not move freely
temperature; heat; pressure; mass of molecules
The following can speed up or slow down a phase change: ______________ , ________________, ____________ _____ _____________________
if the substance is hot or cold.
addition or subtraction of energy to particles
low or high pressure
mass of molecules
how big or small the molecules are
Recommended textbook explanations
Sarquis, J., Sarquis, M.
Chemistry Matter and Change
Chemistry: Matter & Change, Florida
Glencoe Physical Science, Science Notebook
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