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Physical/Chemical Changes
By Jesse De Los Santos
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Last updated 23 days ago
18 questions
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Question 1
1.
An ice cube melts, then evaporates.
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Question 2
2.
Hydrogen and oxygen gas combine to form water.
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Question 3
3.
A beaker of salt water is boiled until only the salt is left behind.
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Question 4
4.
A piece of paper is torn into several smaller pieces.
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Question 5
5.
Gasoline combusts in the engine of a car, releasing carbon dioxide and water vapor.
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Question 6
6.
An egg is boiled until it becomes solid.
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Question 7
7.
A scoop of sugar is placed in a blender and ground into a fine powder.
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Question 8
8.
Wood scraps are placed into a chipper, which turns them into sawdust.
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Question 9
9.
A mixture of red and blue marbles is separated and sorted.
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Question 10
10.
A plant performs photosynthesis.
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Question 11
11.
Baking soda is heated, causing it to decompose into calcium and carbon dioxide.
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Question 12
12.
Milk is left sitting out too long, and it sours.
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Question 13
13.
A stainless steel pan is heated on the stove.
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Question 14
14.
A pellet of sodium metal is cut into two pieces with a knife.
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Question 15
15.
A pellet of sodium metal is placed into water, causing an explosion.
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Question 16
16.
Sulfuric acid is poured onto a piece of limestone rock, causing bubbling and fizzing.
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Question 17
17.
A helium balloon is popped.
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Question 18
18.
Electricity is conducted through a long copper wire.
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