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Matter and Physical

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Matter and Physical & Chemical Changes – PowerPoint PPT presentation

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Title: Matter and Physical


1
Matter and Physical Chemical Changes
2
Classifying Matter
  • Matter is used to describe anything that has mass
    and takes up space.
  • Matter can be divided into two categories
  • Mixtures contain more than one kind of matter
    and can be separated by physical means
  • Substances may contain more than one kind of
    matter but cannot be separated by physical means.

3
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4
  • Mixtures can be divided into two different
    categories homogeneous and heterogeneous
    Substances can be either an element or a compound

5
Homogeneous
  • A Homogenous mixture is the same throughout.
    Every sample of a homogenous mixture is the same.

6
Heterogeneous
  • A Heterogeneous mixture is one in which different
    samples are not exactly the same.

7
Matter
  • The smallest possible
    particle of a compound that
    retains the properties of the compound is a
    molecule.
  • The smallest possible
    particle of an element is
    called an atom.

8
States of Matter
  • Elements and compounds are usually found in one
    of three different states of matter solid,
    liquid, gas.
  • The molecules in solids, liquids, and gases all
    vibrate differently and as a result have
    different properties.

9
  • A solid retains its shape and size.
  • A liquid will take the shape of whatever
    container it is in.
  • Gases have neither a shape or size.

10
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11
Changing State
  • The movement of the molecules change. The number
    of molecules does not change.
  • The mass of the substance remains the same
    whether it is in a solid, liquid, or gas state.

12
Phase Changes
13
Phase Changes
14
Chemical vs. Physical Properties
  • Chemical properties are properties of an element
    or compound in chemical reactions. For example,
    the fact that sodium reacts with water is a
    chemical property.
  • Physical properties are properties of an element
    or compound that can be observed without a
    chemical reaction of the substance. A substance's
    color and density are physical properties.

15
Chemical vs. Physical Changes
  • In a physical change, the substances are not
    altered chemically, but merely changed to another
    phase (i.e. gas, liquid, solid) or separated or
    combined.
  • In a chemical change, the substances are altered
    chemically and display different physical and
    chemical properties after the change.
  • http//www.bcscience.com/bc9/pgs/videos_012_chemch
    ange.html

16
Physical Change
  • Physical changes occur when matter changes its
    property but not its chemical nature.
  • Physical property changes could include a change
    in texture, shape, size, color, odor, volume,
    mass, weight, and density.

17
Physical Change
18
Chemical Change
  • Chemical changes are changes matter undergoes
    when it becomes new or different matter.
  • To identify a chemical change look for signs such
    as color change, bubbling and fizzing (gas or
    odor), light production, smoke, and presence of
    heat.

19
Chemical Change
  • A chemical change occurs when fireworks are used.
    Fireworks are made of metals such as magnesium
    and copper. These change chemically as they
    light up the sky.

20
Is it a chemical or physical change?
  • Sugar dissolving in tea
  • Chemical Change
  • Physical Change

21
Is it a chemical or physical change?
  • Logs burning
  • Chemical Change
  • Physical Change

22
Is it a chemical or physical change?
  • Breaking water up by separating it into hydrogen
    and oxygen
  • Chemical Change
  • Physical Change

23
Is it a chemical or physical change?
  • Cutting paper
  • Chemical Change
  • Physical Change

24
Is it a chemical or physical change?
  • Metal rusting
  • Chemical Change
  • Physical Change

25
Is it a chemical or physical change?
  • Lighter fluid burining
  • Chemical Change
  • Physical Change

26
Is it a chemical or physical change?
  • An egg rotting
  • Chemical Change
  • Physical Change

27
Is it a chemical or physical change?
  • An egg breaking
  • Chemical Change
  • Physical Change

28
Explain the photo
  • Describe
  • 1. what just occurred
  • 2. what is currently occurring
  • 3. What will occur
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