chemical change G4

Which of these changes is a chemical change?

• rusting

• mixing

• melting

• freezing

Which of these changes is NOT a chemical change?

• rusting

• mixing

• melting

• freezing

• cooking food

Latifa gets a new silver bracelet. After a few days, the bracelet tarnishes and leaves a black ring on Latifa’s arm. What type of change does the bracelet undergo?

• a property change

• a physical change

• a matter change

• a chemical change

When wood burns, it changes to ash. Why is this change a chemical change?

• The wood became a new substance with different properties.

• The wood has changed shape but is still wood.

• The wood still has the same properties.

• The wood has changed in temperature.

Maya and Daniel went camping. These pictures show some of the things they did. Which picture shows a chemical change taking place?

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When a candle burns, it appears to become smaller in size. Which statement is true?

• The mass of the matter is the same before and after it is burned.

• The mass of the matter is greater before it is burned.

• All the changes taking place are chemical changes.

• All the changes taking place are physical changes.

Which picture shows a chemical change?

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Which pictures show a physical change?

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All matter has certain chemical properties. What is a chemical property?

• any property that describes how a substance with other substances

• any property that causes matter to stay the same

• any property related to size and weight

• any property related to color and shape

Which chemical property causes iron to become a crumbly, brownish-orange substance over time?

• its ability to tarnish

• its ability to bend

• its ability to burn

• A. its ability to rust