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Chapter 2 Matter and Change

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START IT UP PUP Chapter 2 Matter and Change Unit Notes * * * * * * * * * * * * Section 2.1 Properties of Matter What is matter? Which of these is matter? air water ... – PowerPoint PPT presentation

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Title: Chapter 2 Matter and Change


1
Chapter 2 Matter and Change
START IT UP PUP
  • Unit Notes

2
Section 2.1 Properties of Matter
  • What is matter?

3
Which of these is matter?
water
air
light
darkness
smoke
human
diamond
cold
heat
sound
jello
cloud
4
What is matter?
  • Matter is anything that has mass and takes up
    space.
  • Matter can be classified by extensive or
    intensive properties.
  • Extensive depends on the amount of matter in the
    sample.
  • Intensive does not depend on the amount but the
    type of matter in the sample.

5
What is a substance?
  • Matter that has a uniform and definite
    composition is called a substance.
  • Examples are gold, copper, iron, water, sodium
    chloride (salt), oxygen (see table 2.1)
  • Physical properties can be used to identify
    unknown substances.

6
States of Matter
  • The three main states of matter are solid,
    liquid and gas.

7
Solids
  • Solids have a definite shape and volume.
  • The shape of the solid doesnt depend on the
    shape of the container.
  • Solids are incompressible.
  • Expand slightly when heated.
  • Particle vibrate in place.

8
Liquids
  • Indefinite shape
  • Definite volume
  • Not easily compressed
  • Expand slightly when heated.
  • Particles can flow.

9
Gases
  • Indefinite shape.
  • Indefinite volume.
  • Easily compressed.
  • Particles are free to roam everywhere.

10
Vocabulary Cards
  • Matter
  • Extensive
  • Intensive
  • Substance

11
SUM IT UP
  • Yup, yup

How can you tell if something is matter?
SUM IT UP PUP
12
Mixtures 2.2
  • Mixtures are classified into two groups.
  • Mixtures are physical blends of two or more
    components.
  • Heterogeneous mixtures are not uniform. Their
    components are not evenly distributed.
  • Homogeneous mixtures are uniform and their
    components are evenly distributed.
  • Phases describe any part of a mixture that has
    uniform composition and properties.

13
What kind of mixture is it?
heterogeneous
Homogeneous
Homogeneous
Homogeneous
heterogeneous
14
Elements and compounds 2.3
  • Compounds can be broken down into simpler
    substances by chemical means.
  • Elements cannot.
  • If the composition of a material is fixed, the
    material is a substance.
  • If the composition of a material can vary, it is
    a mixture.
  • Chemical symbols are used to represent elements
    on the periodic table.

15
Chemical Reactions 2.4
  • During a chemical change, the composition of
    matter always changes.
  • A substance present at the start of the reaction
    is called the reactant.
  • The substance present at the end of the reaction
    is called the product.
  • Clues that a chemical change has occurred are
    energy transfer (hot or cold feeling), change in
    color, gas production, formation of a precipitate
    (solid stuff)
  • During any chemical reaction, the mass of the
    reactants and the products must equal each other.
  • Its called the Law of Conservation of Mass.

16
How can you recognize a physical versus and
chemical change?
Breaking glass
Ice pack
Rusting car
Frying an egg
Burning a match
Boiling water
Shaking pop
Hand warmers
Chopping veggies
Freezing water
Cooking macaroni
Baking a cake
17
Vocabulary Cards
  • Mixture
  • Heterogeneous
  • Homogeneous
  • Compound
  • Element
  • Reactant
  • product

18
SUM IT UP
How can you tell if a chemical instead of a
physical reaction has taken place?
19
LETS REVIEW SO WE DONT HIT A WALL WHEN WE TAKE
THE TEST
20
Substance
  • Matter that has the same composition and
    properties throughout is called a substance.

21
Compound
  • A compound is a substance whose smallest unit is
    made up of atoms of more than one element
    chemically bonded together.

22
Mixture
  • When two or more substances (element and
    compounds) come together but dont combine to
    create a new substance, a mixture results.

23
Homogeneous Mixture
  • These mixtures are the same throughout. You cant
    see the different parts.

24
Heterogeneous Mixture
  • These mixtures are not the same throughout and
    you can see the individual parts.

25
Which one is it?
compound
compound
mixture
compound
mixture
mixture
26
A chemical reaction must make something totally
different that has different properties from when
it started.
And you end with the
You start with the
products
reactants
27
When you make a sandwich, what do you do?
28
When you make a sandwich, what do you do?
Products
Reactants
29
(No Transcript)
30
SCIENCE SWAG
EXTRA CREDIT Create a video, poem or story about
the states of matter. Poem or story must be one
page. Video must be 2 minutes. Make sure the
projects include good facts about the states of
matter. Due in one week.
31
POST IT UP
What is the Law of Conservation of Mass?
I GOT THIS!
I NEED HELP!
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