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Physical And Chemical Changes
Test Description: FCAT PRACTICE
Instructions: Answer all questions to get your test result.
1) Matter can undergo physical and chemical changes. A physical change is a change of matter from one form to another without a change in the identify of the substance. Which process is an example of a physical change?
A
wood burning
B
milk souring
C
ice melting
D
metal rusting
2) Pablo notices that ice cream begins to melt when left out at room temperature. What is Pablo observing?
A
formation of a new substance
B
chemical change
C
chemical reaction
D
physical change
3) Gallium is a metal. If you hold a solid piece of pure gallium in your hand, your body warmth will melt the gallium. What is this an example of?
A
physical change
B
absorption
C
displacement
D
chemical change
4) In the laboratory, Austin is given a mixture of iron filings, sand, and salt. To separate the mixture, Austin uses a magnet, boiling water, and a filter. Which statement is true about the process Austin uses to separate this mixture?
A
Austin uses neither physical nor chemical changes to separate the mixture’s components.
B
Austin uses only chemical changes to separate the mixture’s components.
C
Austin uses only physical changes to separate the mixture’s components
D
Austin uses both physical and chemical changes to separate the mixture’s components.
5) A molecule is involved in a chemical reaction, causing the arrangement of its atoms to change. What is the result of this process?
A
a different molecule with different properties is formed
B
bonds are neither formed nor broken, so mass is conserved
C
new atoms are formed
D
the mixture is separated into its component parts
6) There are several differences between chemical and physical changes. Which process is an example of a chemical change?
A
steam rising from a boiling pot of soup
B
a metal railing rusting in damp weather
C
a piece of wood shrinking as it dries out
D
alcohol evaporating from a cotton swab
7) Alison finds the total mass of a sample of baking soda, a balloon, and a glass container with vinegar in it. She adds the baking soda to the vinegar and immediately places the balloon over the mouth of the container. After the reaction is complete,
A
Mass is lost during the reaction because the gas can change in volume but baking soda and vinegar cannot.
B
Mass is gained during the reaction because a chemical change is taking place.
C
The mass does not change because chemical changes observe the law of conservation of mass.
D
Mass is lost during the reaction because the gas is less dense than the baking soda or vinegar.
8) Rita wants to make some toast for breakfast, which she knows involves a chemical change to the bread. She puts a slice of bread in the toaster, but, after 10 minutes, she notices that the sides of the bread are black. What caused this chemical change
A
a decrease in temperature
B
the size of the bread
C
an increase in temperature
D
the type of bread
9) Which types of changes observe the law of conservation of mass?
A
only chemical changes
B
physical and chemical changes
C
only physical changes
D
only changes of state
10) When paper is burned, the mass of the remaining ash is less than the mass of the original paper. Which statement best explains this result?
A
Some of the products of the reaction were given off as a gas.
B
Some of the matter is destroyed during the reaction.
C
The ash has less volume than the paper.
D
The mass of the ash cannot be accurately determined.
*select an answer for all questions
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