Title: Physical and Chemical Changes
1Physical and Chemical Changes
2Everything that has mass and volume is called
matter.Everything is made of matter
What is matter?
3Matter has properties
- Two basic types of properties that we can
associate with matter. - Physical properties
- Chemical properties
4What are properties?
- h
- Characteristics used to identify, describe and
classify matter - Two basic types of properties of matter are
Physical properties and Chemical properties
5Physical Properties
- Characteristic of a substance that can be
measured/observed (using your senses) without
changing the substance into something else.
Hardness Texture Color
Odor Taste Temperature
6More EXAMPLES - Physical
- size, shape, freezing point, boiling point,
melting point, density, mass, volume, Physical
State (solid, liquid or gas) magnetism,
viscosity, density, luster and many more. - Viscosity - The resistance of a liquid to
flowing. - Examples
- Low viscosity-water, rubbing alcohol
- High viscosity-honey
7 Chemical Properties
- Chemical properties are characteristics involved
when a substance interacts with another substance
to change its chemical make-up.
Flammability Rusting Creating gas bubbles
Creating a new chemical product Reactivity with water pH
8Alike? Different?
- Draw a double bubble map in your notes to compare
and contrast physical and chemical properties.
9Matter
- Matter is everywhere.
- Matter is anything that takes up space and has
mass. - Matter is constantly experiencing both chemical
and physical changes.
10Physical 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, volume, mass,
weight, and density.
11Examples of Physical Changes
- Boiling
- Freezing
- Dissolving
- Breaking
- Making a mixture
- 2 or more types of matter (substances) mixed
together - Not in specific amounts
- Can be separated physically
12Chemical Change
- Chemical changes are changes matter undergoes
when it becomes new or different matter. - To identify a chemical change look for signs such
as, bubbling and fizzing, light production, color
change with an odor, smoke, and presence of heat.
13Evidence of a Chemical Change
- Formation of gas
- Formation of precipitate (a solid that results
from two liquids reacting) - Change in color
- Change in energy
- Endothermic Absorbs heat energy (gets cold)
- Exothermic Releases heat energy (gets hot)
14What kind of changes does matter undergo?
- The type of change that occurs in matter depends
on the type of properties that are changed. - Physical changes change physical properties only
- Chemical changes change chemical properties and
physical properties
15Chemical Changes
- The composition of the substance changes.
- The substances present at the beginning of the
change are not present at the end new substances
are formed. The change cannot be undone.
16Is it a chemical or physical change?
17OOPS!
- Did it change size, color, shape (Physical
Change)? - or
- Did it become different matter (Chemical Change)?
18Correct!
19Is it a chemical or physical change?
20OOPS!
- Did it change size, color, shape (Physical
Change)? - or
- Did it become different matter (Chemical Change)?
21Correct!
22Is it a chemical or physical change?
- Breaking water up by separating it into hydrogen
and oxygen
23OOPS!
- Did it change size, color, shape (Physical
Change)? - or
- Did it become different matter (Chemical Change)?
24Correct!
25Is it a chemical or physical change?
26OOPS!
- Did it change size, color, shape (Physical
Change)? - or
- Did it become different matter (Chemical Change)?
27Correct!
28Is it a chemical or physical change?
29OOPS!
- Did it change size, color, shape (Physical
Change)? - or
- Did it become different matter (Chemical Change)?
30Correct!
31Is it a chemical or physical change?
32OOPS!
- Did it change size, color, shape (Physical
Change)? - or
- Did it become different matter (Chemical Change)?
33Correct!
34Is it a chemical or physical change?
35OOPS!
- Did it change size, color, shape (Physical
Change)? - or
- Did it become different matter (Chemical Change)?
36Correct!
37Is it a chemical or physical change?
38OOPS!
- Did it change size, color, shape (Physical
Change)? - or
- Did it become different matter (Chemical Change)?
39Correct!
40Is it a chemical or physical change?
41OOPS!
- Did it change size, color, shape (Physical
Change)? - or
- Did it become different matter (Chemical Change)?
42Correct!
43Writing Activity
- Write a paragraph about the difference between a
chemical and physical change. Give examples of
each.