Properties of Matter: Physical and Chemical Characteristics Explained

The video tutorial explains the properties of matter, distinguishing between physical and chemical properties. Physical properties can be observed without changing the substance's identity, such as color and shape. Chemical properties indicate a substance's ability to undergo chemical changes, like flammability. The video differentiates between physical changes, where the substance's identity remains the same, and chemical changes, which result in new substances. Examples include tearing paper (physical change) and rusting metal (chemical change). The law of conservation of mass is also discussed, emphasizing that mass remains constant during chemical changes.

Which of the following is a physical property of matter?

• Reactivity with acid

• Color

• Ability to rust

• Flammability

Which of the following is NOT a physical property?

• Boiling point

• Flammability

• Magnetism

• Texture

What distinguishes a chemical property from a physical property?

• Physical properties are always visible.

• Physical properties involve a change in the substance's identity.

• Chemical properties can be observed without changing the substance.

• Chemical properties involve a change in the substance's identity.

Which of the following is an example of a physical change?

• Melting ice

• Rusting iron

• Burning wood

• Baking a cake

What is an example of a physical change involving water?

• Water boiling

• Water rusting

• Water reacting with sodium

• Water burning

What happens to the identity of a substance during a chemical change?

• It remains the same.

• It changes to a new substance.

• It becomes a solution.

• It becomes a mixture.

Which of the following is an example of a chemical change?

• Melting wax

• Baking cookie dough

• Boiling water

• Freezing water

What does the law of conservation of mass state?

• Mass is created during a chemical change.

• Mass is destroyed during a chemical change.

• Mass is neither created nor destroyed during a chemical change.

• Mass is always increased during a chemical change.

Which property of fireworks is responsible for their explosion?

• Shape

• Density

• Combustibility

• Color

What happens to the mass of substances before and after a chemical change?

• The mass doubles.

• The mass increases.

• The mass decreases.

• The mass remains the same.