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Questions and Answers
When charcoal burns, it produces a gas molecule called oxygen.
When charcoal burns, it produces a gas molecule called oxygen.
False
Chemical changes enable our bodies to carry out their functions.
Chemical changes enable our bodies to carry out their functions.
True
Frying eggs is an example of a physical change.
Frying eggs is an example of a physical change.
False
A chemical reaction consists of only one part: the products.
A chemical reaction consists of only one part: the products.
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In a chemical equation, the arrow separates the products from the reactants.
In a chemical equation, the arrow separates the products from the reactants.
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The law of conservation of mass states that matter is destroyed during a chemical reaction.
The law of conservation of mass states that matter is destroyed during a chemical reaction.
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Mixing two materials can result in the formation of new substances.
Mixing two materials can result in the formation of new substances.
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Chemical bonds are forces that hold atoms together.
Chemical bonds are forces that hold atoms together.
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When coal burns, it forms new molecules of carbon monoxide.
When coal burns, it forms new molecules of carbon monoxide.
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A change in color can be a sign of a chemical change.
A change in color can be a sign of a chemical change.
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The release of gases always indicates a chemical change.
The release of gases always indicates a chemical change.
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The color change when food coloring is added to water indicates a chemical change.
The color change when food coloring is added to water indicates a chemical change.
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