Transcript Daily TAKS Connection

Daily TAKS Connection:
Physical and Chemical
Changes
Objective 4
IPC(8) The student knows that changes in matter affect everyday life.
The student is expected to:
(A) Distinguish between physical and chemical changes in matter
such as oxidation, digestion, changes in states, and stages in the
rock cycle.
Construct a two tab foldable
 Materials
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Sheet of paper
scissors
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Instructions:
 Hamburger fold the
handout along
center dash line
 Cut along solid line
from edge to center
fold
 Color “Physical
Changes” flap
 Color “Chemical
Changes” flap a
second color
Features of a Physical Change
Record the following notes under the “Physical
Changes” flap
 Identity of material DOES NOT change

Ex: when you crush ice, the resulting material
is still ice
 Includes: changes in state (evaporation,
condensation, melting, boiling, freezing)
 More words to look for:
“Words to Look For”
(Write these under Physical Changes Flap)
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subduction of plates
heat loss from lava
compression of sediments
evaporation of water from
the surfaces of leaves
 condensation of water on
dust particles in the air
forming clouds and fog
 ice cracking
 spoonful of sugar is
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dissolved in a cup of
coffee.
lead melting
copper wire is cut into
smaller pieces.
water molecule gains
enough energy to enter the
vapor phase
antifreeze is added to a car
radiator to lower the
freezing point
moon rocks being converted
to lunar soil by
sedimentation
Question (hint: look for the words
indicating type of change)
In the rock cycle, which of these is a physical
change involved with the formation of
igneous rocks?
a. Compression of sediments
b. Subduction of plates
c. Heat loss from lava
d. All of the above
Question (hint: look for the words
indicating type of change)
Sheets of ice containing mostly pure water can be
formed by decreasing the temperature of saltwater.
Which of these best describes this change?
a.
b.
c.
d.
Chemical change
Nuclear change
Physical change
Atomic change
Question (hint: look for the words
indicating type of change)
Compounds with the same chemical
composition may have different densities
because they —
a. have differences in reactivity
b. vary in solubility
c. are able to bond with oxygen
d. exist in different phases
Clues of a Chemical Change
 Identity of material DOES change
 Ex: oxygen combines with iron to form iron oxide (rust)
 Includes all chemical changes
 Words to look for: Souring, rotting, decomposing,
burning, changing, forming, producing, acid
weathering, rusting, oxidizing
 More words to look for:
“Words to Look For”
(Write these under Chemical Changes Flap)
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A silver bracelet tarnishes.
A bicycle is left out in the
rain and begins to rust.
 Leaves on an oak tree turn
red as winter approaches .
 Starches and sugars being
broken down during energy
production

Water and carbon dioxide
being converted to glucose
 Iron in rock combining with
oxygen to form hematite
 Acid rain damaging marble
Question (hint: look for the words
indicating type of change)
Which of the following is an example of a
chemical change?
a. Ice cracking
b. Sugar dissolving
c. Milk souring
d. Lead melting
Question (hint: look for the words
indicating type of change)
Which of these describes a pollution-producing process
that involves a chemical change?
a. Coal with a high sulfur content is burned, producing
gases that cause acid rain.
b. Chlorofluorocarbons are released, changing ozone in
the upper atmosphere into oxygen.
c. Nitrogen oxide emissions combine with water vapor,
producing nitric acid.
d. All of the above
Question (hint: look for the words
indicating type of change)
Which of these changes in rocks is NOT a chemical
change?
a. Acid rain damaging marble
b. Carbonic acid weathering limestone
c. Iron in rock combining with oxygen to form hematite
d. An ice wedge shattering a slab of shale
Apply Your Knowledge

Determine if the scenarios written on each
card belong under the Chemical Change or
Physical Change Heading.
Begin Sorting and Classifying!!