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Conservation Of Matter
Test Description: A review of the law of conservation of matter
Instructions: Answer all questions to get your test result.
1) A student places an ice cube in a jar and closes the lid. The ice cube weighs 28 grams. The jar weighs 100 grams. The student sets the jar in a window by the sun. How much will the jar and water together weigh after the ice melts in the sun?
A
28 grams
B
72 grams
C
100 grams
D
128 grams
2) 30 grams of baking powder and 30 grams of vinegar are placed in a jar with a lid, and the mixture is shaken. How much will the new liquids and gases weigh together?
A
more than 60 grams
B
less than 60 grams since a gas forms
C
60 grams
D
this information cannot be determined
3) A stick of butter (113 grams) melts. How much should the liquid butter weigh?
A
this information cannot be determined
B
113 grams
C
less than 113 grams
D
more than 113 grams
4) 30 grams of vinegar is poured into 30 grams of baking soda in a jar that does NOT have a lid. Why will the new substance that forms weigh less that 60 grams?
A
It should still weigh 60 grams.
B
Since the jar is open, some of the gas matter rises up out of the jar.
C
Some of the solid matter becomes a liquid and gas.
D
Some of the matter is destroyed by the experiment.
5) 20 grams of water is poured into a jar with 10 grams of sugar, and it is stirred. How much does the sugar water mixture weigh together?
A
more than 30 grams
B
this information cannot be determined
C
30 grams
D
less than 30 grams because the sugar dissolves
6) 20 grams of water is poured into a jar with 10 grams of pepper, and it is stirred. How much does the pepper water weigh together?
A
this information cannot be determined
B
more than 30 grams because the pepper does not dissolve
C
less than 30 grams because the pepper does not dissolve
D
30 grams
7) 100 grams of cheese is melted in a microwave. How much should the liquid cheese weigh?
A
100 grams
B
90 grams
C
more than 110 grams
D
110 grams
8) If 1 gram of food coloring is dropped into 10 grams of water, the mixture will weigh:
A
less than 9 grams
B
10 grams
C
11 grams
D
9 grams
9) 30 grams of salt is poured into 100 grams of water. How much will the salt water mixture weigh after the salt dissolves?
A
this information cannot be determined
B
100 grams
C
70 grams
D
130 grams
10) 10 grams of milk is poured into 200 grams of coffee. How much will the milk and coffee weigh together?
A
10 grams
B
200 grams
C
190 grams
D
210 grams
*select an answer for all questions
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