Matter and Reactions 4. Chemical Reactions Quiz

Give 4 signs of a chemical reaction.

• Colour change, Gas given off, Precipitate forms, Energy change

• Temperature drop, Light absorption, Sound production, Odor change

• Mass increase, Volume decrease, Shape change, Texture change

• Light absorption, Sound production, Odor change, Mass increase

What always happens during a chemical reaction?

• A new substance is formed.

• The temperature decreases.

• The color remains the same.

• The mass increases.

What would you observe if a gas is given off in a reaction?

• Fizzing or bubbles

• Color change

• Temperature drop

• Mass increase

What is a precipitate?

• A solid formed from solutions during a chemical reaction

• A gas released during a chemical reaction

• A liquid formed from solutions during a chemical reaction

• A color change observed during a chemical reaction

Give 3 indicators of an energy change.

• Heat is taken in, Heat is released, Light is produced

• Mass increases, Volume decreases, Shape changes

• Color changes, Odor changes, Sound is produced

• Temperature drops, Mass increases, Volume decreases

How is a physical change different than a chemical change?

• No new substance is formed in a physical change.

• A new substance is formed in a physical change.

• Energy is absorbed in a physical change.

• Color changes in a physical change.

Is burning a wooden splint a physical or chemical change?

• Chemical

• Physical

• Neither

• Both

Is ice melting a physical or chemical change?

• Physical

• Chemical

• Neither

• Both

Is chopping an apple a physical or chemical change?

• Physical

• Chemical

• Neither

• Both

Is baking a cake a physical or chemical change?

• Chemical

• Physical

• Neither

• Both