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Conservation of Matter
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What happens to the mass of a tablespoon of salt after it dissolves in water?
 
It would stay the same.
 
It would weigh more.
 
It would weigh less.
 
It would not have any weight
An ice cube has a mass of 5 grams just after taking it out of the freezer. What is the mass after it melts?
 
5 grams
 
10 grams
 
1 gram
 
It cannot be massed after it melts.
Mr. Green was building a squirrel feeder. He had two pieces of wood that weighed 2 kg. When he cuts the wood pieces into two, how many pieces of wood will Mr. Green have?
 
4 pieces
 
6 kg
 
2 pieces
 
4 kg
If the squirrel is using the feeder, will the mass increase or decrease?
 
INCREASE
 
DECREASE
Brianna melted an ice cube that weighed 260 grams. If all of the ice changed into a liquid, what would be the weight of the liquid water?
 
260 g
 
.5 g
 
60 g
 
15.5 g
Brooks boiled 67.5 grams of water. If all of the water changed into a gas, what would be the weight of the water vapor?
 
67.5 g
 
0 g
 
.5 g
 
65.5 g
Skylar weighed an ice cube in science class using a balance scale. She found that the ice cube weighed 277 grams. She melted the ice cube using a blow dryer. What is the weight of her ice cube ?
 
277 g
 
27 g
 
0 g
 
777 g
Brielle has 300.2 grams of water. If she froze the 300.2 grams of water, what would be the total weight of the ice cube?
 
300.2 grams
 
301.2 grams
 
.2 grams
 
300 grams
Jesse has a block of ice that has a weight of 305 grams. If he breaks that block of ice into three pieces, what is the weight of the three pieces combined?
 
305 g
 
5 g
 
.5 g
 
It has no weight
Mrs. Bostick has an apple pie. The weight of the apple pie is 250 g. She eats 150 grams of it. How much is left for Mrs. Bolen to have a piece?
 
100 g
 
350 g
 
150 g
 
250 g
Mr. Kauffman pours 20 grams of salt into a beaker that contains 500 grams of water. He stirs the mixture until he can no longer see any pieces of salt in the water. How much does Mr. Kauffman’s mixture of salt and water weigh?
 
520 g
 
500 g
 
20 g
 
512 g
Emma pours 15 grams of sugar into a beaker that contains 300 grams of water. She stirs the mixture until she can no longer see any pieces of sugar in the water. How much does Emma’s mixture of sugar and water weigh?
 
315 g
 
300 g
 
150 g
 
135 g
Breeze pours 42 grams of sand into a cup that contains 150 grams of water. If Breeze stirred that sand all around, what would be the weight of sand and water together?
 
192 g
 
190 g
 
150 g
 
42 g
What does the law of conservation of mass state?
 
Matter cannot be created or destroyed, it just changes form.
 
Matter can change form if it is destroyed.
 
Matter cannot change form.
When matter goes through a change, what happens to its mass?
 
It stays the same
 
It decreases
 
It increases
 
It does whatever it wants
Even when matter goes through a physical or chemical change the matter cannot be ___________________ or _____________________.
 
created or destroyed
 
permed or straightened
 
painted or erased
 
chewed up or eaten