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Chemical And Physical Reactions
Test Description: What is the difference between physical and chemical changes?
Instructions: Answer all questions to get your test result.
1) A reaction occurs in a beaker of fluid, and a white substance settles to the bottom. This precipitate is evidence that what process has occurred?
A
Heat Exchange
B
Chemical Reaction
C
Gas Exchange
D
Physical Change
2) Which example shows a change in a state of matter?
A
Nail rusting
B
Liquid pouring
C
Wood Burning
D
Ice melting
3) Which process BEST illustrates elements combing to make a new compound?
A
Boiling a liquid to make steam
B
Mixing two liquids to make a solid
C
Melting a solid to make a liquid
D
Cutting a solid to make more parts
4) Two basic types of changes occur in chemistry: physical and chemical. Which examples represents a chemical change?
A
shredding paper
B
breaking glass
C
melting ice cream
D
food spoiling
5) Which example indicates a chemical reaction occurred?
A
sugar dissolved
B
Wax melted
C
water boiled
D
nails rusted
6) Matter can undergo both chemical and physical changes. What indicates that the change was definitely chemical?
A
The color changed
B
The temperature changed
C
A gas formed
D
A precipitate formed
7) Which example shows a physical change taking place?
A
A precipitate is formed
B
The substance melts
C
A new substance is produced
D
Heat is given off
8) What would the breaking up of a large rock into small rocks be considered?
A
Chemical reaction
B
physical property
C
physical change
D
Chemical property
9) Which is an example of a physical change?
A
Wood burns to ash and gases
B
Water boils and creates bubbles and gas vapor
C
Carbon dioxide combines with limewater and produces chalk
D
Iron turns to reddish-brown as it rusts
10) Which is an example of a chemical change?
A
combustion
B
cutting paper
C
Melting
D
Boiling
*select an answer for all questions
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