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