Chemical Change Vocabulary

What is a physical property in Chemistry?

• A physical property is a feature of a substance that can be observed or measured without affecting the identity of the substance.

• A physical property is a feature that forms when two substances react.

• A physical property is a change that results in the formation of new substances.

• A physical property is a characteristic that can only be seen and observed during chemical reactions.

Which of the following examples exemplify a chemical property?

• Melting point

• Flammability

• Color

• Density

What is a chemical change in Chemistry?

• A chemical change is a change that only affects the appearance of a substance.

• A chemical change is a change that only involves the physical state.

• A chemical change is a change that does not release energy.

• A chemical change is a change that forms a new substance.

Which of the following is an example of an exothermic reaction?

• Does not produce any new substances.

• Releases energy in the form of heat.

• Involves the melting of a solid.

• Absorbs energy.

Which of the following is an example of an endothermic reaction?

• Rusting of iron.

• Freezing water.

• Melting ice.

• Combustion.

What is a precipitate in Chemistry?

• A gas produced in a chemical reaction.

• A solid that forms when two soluble compounds react.

• A precipitate is a solid that forms when two soluble compounds react.

• A product that remains dissolved in the solution.

Which of the following is an example of a product in a chemical reaction?

• Glucose in cellular respiration.

• Hydrogen in water formation.

• Sodium in salt formation.

• Oxygen in photosynthesis.

Which of the following is an example of an exothermic reaction?

• Photosynthesis

• Evaporating water.

• Respiration.

• Melting ice.

What does an endothermic reaction do?

• It absorbs energy.

• It remains at a constant temperature.

• It releases energy.

• It does not change the substance.

Which of these is an example of a physical change?

• Cooking an egg.

• Rusting of iron.

• Melting wax.

• Burning paper.