SECTION
PROPERTIES ARE USED TO IDENTIFY SUBSTANCES.
2.3 Reading Study Guide B
BIG IDEA Matter
has properties that can be changed by physical and
chemical processes.
KEY CONCEPT
Properties are used to identify substances.
Review
Matter can change from one state to another.
I.
Substances have characteristic properties. (p. 58)
A. Identifying Unknown Substances (p. 59)
1.
What are some properties of an unknown substance that could easily
be measured?
2.
A student knows that only one of the two vials shown below contains pure
water. She observes the properties listed for each vial. Which vial do you think
contains water? How do you know?
A
strong odor
slippery texture
clear in color
boiling point 135°C
B
B. Properties Used For Identifying Substances (p. 59)
3.
Fill in the main-idea web for the main idea shown.
Different properties can be
used to identify substances.
You can compare the
density of an unknown
substance with the density
of a known substance.
no odor
wet, but not slippery texture
clear in color
boiling point 100°C
Copyright © by McDougal Littell, a division of Houghton Mifflin Company
CHAPTER 2
Properties of Matter
Take Notes
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4.
Why can’t mass alone be used to identify objects?
Give three examples describing how mixtures can be separated by using the
properties of the substances in them.
6.
The tray below contains sawdust mixed with steel nails. You want to use the
sawdust for another purpose, but you need to get the nails out first. Describe two
methods that you could use to separate the two substances.
Copyright © by McDougal Littell, a division of Houghton Mifflin Company
5.
CHAPTER 2
Properties of Matter
II. Mixtures can be separated by using the properties of the substances
in them. (p. 61)
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