Big Idea 8 and 9 Flashcard

Front

What is a chemical change?

Back

A chemical change is a process where substances combine or break apart to form new substances with different properties.

Front

Give an example of a chemical change.

Back

Cooking pancakes is an example of a chemical change because it transforms the ingredients into a new substance.

Front

What is not a chemical change?

Back

Evaporating water is not a chemical change; it is a physical change because the water remains H2O.

Front

How can you determine the volume of an object?

Back

You can determine the volume of an object by using water displacement; drop the object in water and measure the rise in water level.

Front

What evidence shows that decaying is a chemical change?

Back

A change in color and odor provides evidence that decaying is a chemical change.

Front

What happens during a chemical change?

Back

During a chemical change, the bonds between atoms are broken and new bonds are formed, resulting in new substances.

Front

What is an example of a physical change?

Back

Making ice cubes is an example of a physical change because it changes the state of water but not its chemical composition.

Front

What is rusting?

Back

Rusting is a chemical change that occurs when iron reacts with oxygen and moisture, forming iron oxide.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change alters the form of a substance but not its chemical composition, while a chemical change results in the formation of new substances.

Front

What is the role of temperature in chemical changes?

Back

Temperature can affect the rate of chemical changes; higher temperatures usually increase the rate of reaction.