Chemical Properties Answers

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Which statements describe chemical changes? Check all that apply.The after-rain smell is produced by an interaction between rain and the oils released by plants.A homemade volcano can be created by combining baking soda and vinegar. When it erupts, carbon dioxide gas is released.Sheep are sheared for their wool. The wool is cleaned and twisted into yarn. The yarn is dyed and used to knit clothing.The Statue of Liberty has turned green over time due to the reaction of copper with carbon dioxide and water.Mosaic art is created by smashing colored glass tiles and rearranging them to form a picture or design.

A
The after-rain smell is produced by an interaction between rain and the oils released by plants.
B
A homemade volcano can be created by combining baking soda and vinegar. When it erupts, carbon dioxide gas is released.
C
Sheep are sheared for their wool. The wool is cleaned and twisted into yarn. The yarn is dyed and used to knit clothing.
D
The Statue of Liberty has turned green over time due to the reaction of copper with carbon dioxide and water.
E
Mosaic art is created by smashing colored glass tiles and rearranging them to form a picture or design.
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Use the drop-down menus to identify the types of changes described.

Answers:
Baking a cake::chemical change
Smashing a soda can::physical change
Shredding paper::physical change
Chopping wood::physical change
Burning wood::chemical change
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Use the drop-down menus to identify the types of properties described.

Answers:
Kerosene was commonly used in lamps because it burns easily.:chemical property
The element nickel has a boiling point of 2,913°C.:physical property
Copper is used to make electrical wire because it is a good conductor.:physical property
Cesium produces an explosion when it is added to water.:chemical property
Hydrogen is the least dense of all elements.:physical property
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✔ physical property chemical property

A
✔ physical property
B
chemical property
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✔ physical property chemical property

A
✔ physical property
B
chemical property
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physical property ✔ chemical property

A
physical property
B
✔ chemical property
9

✔ physical property chemical property

A
✔ physical property
B
chemical property
10

Use the drop-down menus to identify the types of changes described.

Answers:
Baking a cake::chemical change
Smashing a soda can::physical change
Shredding paper::physical change
Chopping wood::physical change
Burning wood::chemical change
11

✔ physical changechemical change

A
✔ physical change
B
chemical change
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✔ physical changechemical change

A
✔ physical change
B
chemical change
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✔ physical changechemical change

A
✔ physical change
B
chemical change
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physical change✔ chemical change

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physical change
B
✔ chemical change
15

Sand is made of tiny pieces of rock that have been worn down by wind and water. Explain why the formation of sand is a physical change.

Answer:

The formation of sand is a physical change because some of the physical properties of the rocks change, but their identities do not. The particles of rock are rearranged as their sizes and shapes change, but their identities and total mass remain the same.

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What did you include in your response? Check all that apply.

A
The particles of rock are rearranged.
B
The sizes and shapes of the rocks are changed.
C
The identities and total mass of the rocks remain the same.
D
A physical change is a change in some of the physical properties of matter, but not its identity.

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