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Chemical Change
Test Description: Chemical and physical change review
Instructions: Answer all questions to get your test result.
1) An ice cube is left on a table for an hour. What evidence shows a physical change takes place?
A
It gives off carbon dioxide.
B
It melts into water.
C
It turns into a different substance.
D
It bubbles and gives off gas.
2) An iron nail left ourdoors for a year undergoes a chemical change. What evidence would be visible? The nail would be:
A
sharper
B
buried in soil
C
rusty
D
bent
3) Three chemicals are mixed together and the resulting mixture is a different color. What is this evidence of?
A
nuclear change
B
chemical change
C
atomic change
D
physical change
4) Which of the following is an example of chemical change?
A
subliming
B
boiling
C
rusting
D
melting
5) Salt is added to water and dissolves. This is evidence of:
A
nuclear change
B
space inversion
C
physical change
D
chemical change
6) Two chemicals are combined and bubbles form. What is the state of the product?
A
plasma
B
solid
C
liquid
D
gas
7) Which of the following is not a chemical change?
A
photosynthesis
B
respiration
C
rusting
D
melting
8) A balloon is placed in a freezer. What is the evidence a physical change has occurred?
A
has shrunk in size
B
cannot be found
C
cannot return to its original size
D
is giving off a new gas
9) How do you know when a chemical reaction has occurred?
A
the mass of the reactants is changed into energy that is given off
B
the substance changes size, shape, texture and mass
C
a new substance has formed
D
a phase change has occurred
10) An iron nail rusts when left outdoors Why might the nail no longer be useful?
A
it has become wet and dry several times
B
it is now made of a softer substance
C
it is not long and skinny anymore
D
it has turned orange and red
*select an answer for all questions
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