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NAME: ___________________________
Chemistry IA
Mrs. Murray
Section 2.1
KEY
TERMS
pure substance
compound
solution
element
heterogeneous mixture
suspension
atom
homogeneous mixture
colloid
Reading
Strategy:
Summarizing
Key
Concepts
Details
1. Matter that always has exactly the same composition is classified as a
__________________ ___________________.
Why are elements and
compounds classified as
pure substances?
2. Why are salt and sugar classified as pure substances?
3. What are the two categories of pure substances?
How do mixtures differ
from pure substances?
4. A ________________ is a substance that cannot be broken down into simpler
substances. It has a ________________composition because it contains only
____ type of atom.
What is the main difference
among solutions, sus5. What is the smallest particle of an element?
pensions, and colloids?
6. What is a compound?
7. Give an example of how a compound’s properties are different from those of
the substances from which it is made.
8. Why can the properties of a mixture vary?
9. What is the difference between homogeneous and heterogenous mixtures?
10. On what basis can mixtures be classified as solutions, suspensions, or
colloids?
11. Give an example of each of the following: solution, suspension, colloid.
12. Fresh milk is a suspension. After fresh milk is homogenized, it is a colloid.
What happens to the size of the drops of fat in milk when milk is
homogenized?
Section 2.2
KEY
TERMS
Reading
Strategy:
Building Vocab
Key
Concepts
What are some examples
of physical properties?
physical property
malleability
filtration
conductivity
boiling point
physical change
As you read, write a definition for each property.
Physical Property
Viscosity
Malleability
Melting point
Definition
Details
1. List seven examples of physical properties.
2. True or False
How can knowing the
physical properties of
matter be useful?
viscosity
melting point
distillation
The greater the viscosity of a liquid, the slower it is to move.
3. Which of the following is more viscous: motor oil or vinegar?
4. If a material is a good conductor of heat, it is usually a good conductor of
_____________________.
What processes are used to 5. Why is ice not considered to be malleable?
separate mixtures?
6. What is the melting point and boiling point of water?
When does a physical
change occur?
7. If a substance has a mass of 10 g and volume of 5 cm3, what is its density?
8. List and briefly explain two common separation methods for mixtures.
9. Identify which of the following are examples of physical changes. Place an “x”
in the blank next to them.
_____ melting ice
_____ baking a cake
_____cutting hair
Section 2.3
KEY
TERMS
chemical property
chemical change
flammability
precipitate
reactivity
Details
Key
Concepts
1. Under what conditions can chemical properties be observed?
2. List three common types of evidence for a chemical change.
3. How do chemical changes differ from physical changes?
When can chemical
properties be observed?
4. Explain why the rusting of an iron bar decreases the strength of the bar.
What observation might
indicate that a chemical
change has occurred?
5. If you spill household bleach on denim jeans, you will observe that the area
of the spill no longer has a blue color. Is this change chemical or physical?
Give a reason for your answer.
What is the difference
between chemical and
physical changes?