Chemical and Physical Changes Assessment

The video tutorial covers the differences between chemical and physical properties and changes. It explains that physical properties can be observed without altering the substance, while chemical properties require a chemical change. Examples of physical changes include grinding coffee beans and melting ice, whereas chemical changes involve reactions like rusting and color changes. The video also outlines four indicators of chemical changes: color change, gas production, energy change, and precipitate formation. The tutorial concludes with practice instructions for students.

Which of the following is a chemical property?

• Boiling point

• Color

• Density

• Flammability

What remains unchanged during a physical change?

• The substance's hardness

• The substance's odor

• The substance's chemical composition

• The substance's color

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

• Baking a cake

• Burning wood

• Melting ice

• Rusting iron

What is the process called when a solid turns directly into a gas?

• Condensation

• Sublimation

• Evaporation

• Freezing

Which phase change involves a gas turning into a solid?

• Evaporation

• Deposition

• Sublimation

• Melting

What is a key indicator of a chemical change?

• Change in shape

• Change in texture

• Change in size

• Change in color

Which of the following is NOT an indicator of a chemical change?

• Change in state

• Production of a new gas

• Formation of a precipitate

• Change in temperature

What happens when baking soda and vinegar are mixed?

• A new solid is formed

• A new gas is produced

• The mixture changes color

• The mixture becomes colder

What is the result of mixing lead nitrate and potassium iodide?

• A new gas is produced

• A new liquid is formed

• A yellow solid precipitate forms

• The solution becomes clear

What should students prepare for after watching the video?

• A quiz on chemical reactions

• A quiz on phase changes

• A quiz on classification of matter and chemical and physical changes

• A quiz on physical properties