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WorksheetsCW#2-5.P.2.3
Total questions: 10
Worksheet time: 3hrs 30mins
Name
Class
Date
1.
Which statement best describes the change that occurs when a piece of wood is burned?
a)
Burning wood is a physical change because the wood changes form.
b)
Burning wood is a chemical change because the wood changes color.
c)
Burning wood is a physical change because the process may be reversed.
d)
Burning wood is a chemical change because the process cannot be reversed.
2.
Physical and chemical properties can be used to classify substances. Which of these shows a chemical property?
a)
Silver melts.
b)
Magnesium burns.
c)
Sulfur is a yellow solid.
d)
Aluminum conducts heat.
3.
Campers burned logs in a campfire.
How would the campers know that a chemical change has taken place?
How would the campers know that a chemical change has taken place?
a)
The logs changed shape.
b)
The rocks glowed when heated.
c)
The wood became a different substance.
d)
The ground absorbed heat from the coals.
4.
Sodium bicarbonate (NaHCO3) is commonly known as baking soda. Sodium bicarbonate is a white solid that can dissolve in water. Under the proper conditions, sodium bicarbonate can release carbon dioxide (CO2) gas. Which of the following is NOT a physical property of sodium bicarbonate?
a)
It is white.
b)
It is a solid.
c)
It can dissolve in water
d)
It releases carbon dioxide.
5.
Which is a chemical change?
a)
frying an egg
b)
boiling water
c)
breaking a glass cup
d)
crushing a piece of bread
6.
Examine the diagram below.
What would a teacher most likely use this image to explain?
What would a teacher most likely use this image to explain?
a)
Heat being added and taken away is causing physical changes in water.
b)
Air being added and taken away is causing physical changes in water.
c)
Heat being added and taken away is causing chemical changes in water.
d)
Air being added and taken away is causing chemical changes in water.
7.
A piece of wood is sawed into several small pieces. This is an example of what kind of change?
a)
physical
b)
chemical
c)
electrical
d)
mechanical
8.
Which would most likely result in change in the state of matter?
a)
baking a cake
b)
boiling water
c)
lighting a match
d)
rusting bike chain
9.
Anna is doing a science experiment. She mixes 1 cup of hot water with 2 cups of salt. What will most likely happen to the substances?
a)
The water and salt will blend, and their properties will be changed.
b)
The water and salt will blend, but their properties will be unchanged
c)
The water and salt will not blend, but their properties will be changed.
10.
Which is a physical change involving an egg?
a)
frying an egg
b)
boiling an egg
c)
breaking an egg
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