Name: _________________________
10.4 Chemical Properties & Changes Homework
Seventh Grade Science – Room 205
Date: _______________ Period: _____
Monday 10/ 19 complete this section for homework Monday night
1. Matter has chemical properties in addition to physical properties. Physical and chemical
properties can be used to describe matter.
Define chemical property.
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Directions: On the line before each phrase, write C if the phrase describes a chemical
property or P if the phrase describes a physical property.
2.
3.
4.
5.
6.
7.
8.
9.
ability to burn
ability to change state
ability to decompose
ability to rust
ability to change shape
ability to fold
ability to rot
ability to tarnish
10. Identify whether each picture shows a physical or chemical change taking place,
explain how you determined what type of change is taking place.
Fireworks
What time of change is taking place here?
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How can you be certain?
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Sugar being mixed with water
What time of change is taking place here?
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How can you be certain?
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Tuesday 10/20 complete this section for homework Tuesday night
Directions: Put a check mark on the line before each sign of a chemical change.
1. change in odor
2. disappearance of a solute
3. change in energy
4. change in shape
5. formation of bubbles
6. change in state
7. change in color
8. change in size
9. How is a chemical/physical property different from a chemical/physical change?
Explain.
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10. What is the only way to be certain that a chemical change has taken place?
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11. Changes in matter can be classified as physical changes or chemical changes. All
chemical changes result in the formation of new substances, with properties that are
different from the starting materials.
Identify the signs that a chemical change might have occurred.
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12. The formation of bubbles is one sign that a chemical change may have occurred.
Identify a physical change that causes bubbles to form, but does not create a new
substance.
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Wednesday 10/21 complete this section for homework Wednesday night
Directions: Write the terms in the correct box to identify if they are a physical property,
physical change, chemical property, or chemical change
ability to burn
crushing
painting
burning
cutting
volume
melting
baking
state of matter
ability to rot
dissolving
solubility
ability to spoil
mass
density
Physical Property
Physical Change
Chemical Property
Chemical Change