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