Matter and Changes - PowerPoint PPT Presentation


PPT – Matter and Changes PowerPoint presentation | free to view - id: 80fb7b-ZDQyN


The Adobe Flash plugin is needed to view this content

Get the plugin now

View by Category
About This Presentation

Matter and Changes


Filtration Evaporation Chromatography Distillation Properties of matter A ... Physical properties are ... a solid to a liquid. Some physical properties of ... – PowerPoint PPT presentation

Number of Views:65
Avg rating:3.0/5.0
Slides: 19
Provided by: Russell206


Write a Comment
User Comments (0)
Transcript and Presenter's Notes

Title: Matter and Changes

Matter and Changes
  • Matter - anything that has mass and takes up
  • Mass - the measurement of the amount of matter in
    an object.
  • We use a balance to determine mass.
  • The amount of space is a volume measurement

Four states of matter
  • Solid - anything that has both a definite volume
    and a definite shape.
  • Liquid - anything that has definite volume but no
    definite shape - flows and can be poured.
  • Gas - has no definite volume and no definite
  • always takes volume and shape of container
  • if not in container, it will spread as far as
  • Plasma - has no definite volume or shape -
    composed of electrical charged particles.

Characteristics of matter
  • Atoms are small particles that make up matter.
  • A pure substance that is made of only one kind of
    atom is called an element.
  • Most elements are found combined together as
    molecules rather than individual atoms.
  • Elements in their pure state are difficult to
    find because they usually react to form
    compounds, a substance that is composed of
    molecules containing more than one element.

Flow Chart Of Matter
physical change
chemical change
Physical Changes
  • One important characteristic of compounds is that
    they cannot be separated into atoms they are made
    of by physical methods.
  • Physical methods include freezing, boiling,
    straining, filtering, or even dissolving in
  • Water, for example, can be frozen or boiled, but
    the ice or water vapor is still water! 
  • Freezing and boiling cannot separate water
    molecules into hydrogen and oxygen atoms.

  • Most matter is not pure but is made of a
    combination of molecules of two or more different
  • A mixture is the combination of different
    molecules that are not chemically combined.
  • The key characteristic of a mixture is that each
    of the different kinds of molecules in the
    mixture keeps its own identity.

  • You can take a mixture apart, and separate the
    different molecules of the mixed substances.
  • Unlike compounds, mixtures can be separated into
    their parts using physical methods.
  • Filtration
  • Evaporation
  • Chromatography
  • Distillation

Properties of matter
  • A substance may be identified by certain
    qualities, or traits - a quality or trait that
    identifies a substance is called a property.
  • The properties of a substance stays the same even
    if its volume changes.
  • Color, mass, small, density, and composition are
    all examples of properties that can help
    scientist identify substances.

  • Every substance has two kinds of properties -
    physical properties and chemical properties.
  • A physical property is a property of matter that
    can be observed or measured without changing the
    composition of the substance.
  • Physical properties are often used to identify

Some physical properties of matter
  • Boiling point - the temperature at which a
    substance changes from a liquid to a gas.
  • Condensation point - the temperature at which a
    substance changes from a gas to liquid same
    temperature as boiling point.
  • Freezing point - the temperature at which a
    substance changes from a liquid to a solid  same
    temperature as melting point.
  • Melting point - the temperature at which a
    substance changes from a solid to a liquid.

Some physical properties of matter
  • Density - the mass of a specific volume of
  • Resistance - the ability of a substance to slow
    down the flow of electric current.
  • Solubility - the degree to which a substance will
    dissolve in a given amount of another substance,
    such as water.

Physical changes
  • A physical change is a change that does not
    produce a new kind of matter.
  • When you stretch a rubber band or crush a cube of
    ice, you are causing physical change.
  • Only certain physical characteristics of matter,
    such as shape, and volume, are changed.

  • Common physical changes include phase changes
    such as freezing, melting and boiling.
  • All pure substances can change from phase to
    phase without changing their chemical
  • When a liquid freezes, it changes from a liquid
    phase to a solid phase.
  • The temperature at which a substance changes from
    a liquid to a solid is called its freezing point.

  • Water for an example, turns to ice at its
    freezing point. If the ice is heated, it changes
    back to a liquid.
  • The temperature at which a substance changes from
    a solid to a liquid is called its melting point.

  • Condensation is the changing of phases from a gas
    to a liquid. Condensation is the opposite of
    boiling. If water is then boiled, it changes from
    a liquid phase to a gaseous phase.
  • Evaporation is the opposite of condensation. A
    liquid changes to a gas and moves into the
    surrounding atmosphere.
  • Sublimation is a phase change in which a solid
    changes directly into a gas. Dry ice is an
    example of a substance that sublimes.

  • Phase changes are related to temperature.  If you
    have a colorless liquid that boils at 100 degrees
    C and freezes at 0 degrees C, you can be
    reasonably certain the substance is

What is a chemical change?
  • Chemical changes are changes substances undergo
    when they become new or different substances.
  • For example, the fireworks we see on the 4th of
    July are actually metals such as magnesium and
    copper that change chemically - they light up the
    night skies with their fantastic colors.

To identify a chemical change look for observable
signs such as
  • Color change
  • Bubbling and fizzing
  • Light production
  • Smoke
  • Presence of heat or cold