Properties Of Matter Flashcards
Smallest part of an element
Atom
A substance that cannot be broken down into smaller substances
Element
A substance made from 2 or more simpler substances and can’t be broken down into those substances
Compound
A compound always contains what?
2 or more elements joined in a fixed proportion.
Contain some of the properties of their individual substances but it does not have a fixed composition
Mixtures
Parts of a mixture are noticeably different from one another.
Heterogenous mixture
It is difficult to distinguish one substance in the mixture from one another
Looks the same
Homogenous mixture
Mixtures are classified as what 3 things
Solutions
Suspensions
Colloids
When substances dissolve and form a homogenous mixture
Solution
A heterogenous mixture that separates into layers over time
Suspension
Do not separate into layers and you cannot filter parts of it out
Colloid
A characteristic of a material that can be observed or measured without changing the composition of the substances in the material
Physical property
The tendency of a liquid to keep from flowing
Viscosity
The greater the viscosity the _________?
Slower the liquid moves
When does viscosity decrease
When a liquid is heated
If it does not allow heat to flow it is a _____?
Insulator
The ability of a solid to be hammared without shattering
Malleability
Most ______ are malleable
Metals
The amount of matter in a given volume
Density
What can be used to test the purity of a substance
Density
Some of the properties of the material change but the substances in the material remain the same
Physical change
Any ability to produce a change in the composition of matter
Chemical property
A materials ability to burn in the presence of oxygen
Flammability
When a substance reacts and forms one or more new substances
Chemical change
Common signs of a chemical change include:
Change in color
Change in gas
Formation of a precipitate
A solid that forms and separates for. A liquid mixture
Precipitate
Has a definite shape and volume
Solid
Has a definite volume but not a definite shape
Liquid
Not a definite volume or shape
Gas
The energy an object has due to its motion
Kinetic energy
The faster and object moves the greater________?
Its kinetic energy
All particles of matter are in constant motion
Kinetic theory of matter
Describe particles in a gas
They are in constant random motion
Why is the volume of a liquid constant
Forces of attraction keep the particles close together
Why do solids have a definite volume and shape
Particles in a solid vibrate around fixed locations
What are atoms like in a liquid
Spread out
What are atoms like in a gas
Atoms move in constant motion
Atoms are spread out
A reversible physical change that occurs when a substance changed from one state of matter to another
Phase change
What is sublimation
Solid to gas
What is deposition
Gas to solid
When a system absorbs energy from its surroundings
Endothermic change
System releases energy to its surroundings
Exothermic change
