Exploring Physical and Chemical Properties

The video tutorial explains the difference between physical and chemical properties using aluminum foil as an example. Physical properties like luster, density, and malleability can be observed without changing the substance. Chemical properties, such as reactivity and flammability, require altering the substance to observe. A demonstration shows aluminum reacting with sodium hydroxide, producing hydrogen gas and heat, illustrating chemical changes. The video concludes with a summary of the key differences between physical and chemical properties.

What is a physical property?

• A property that cannot be measured

• A property that involves a chemical reaction

• A property that can be observed without changing the substance

• A property that changes the substance

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

• Combustibility

• Density

• Flammability

• Reactivity

What does the term 'luster' refer to?

• The phase change of a substance

• The shininess or reflectiveness of a substance

• The ability to bend a substance

• The density of a substance

What happens to aluminum foil when it is bent?

• It remains aluminum foil

• It loses its density

• It changes into a different substance

• It becomes a liquid

At what temperature does aluminum foil melt?

• 500 degrees Celsius

• 660 degrees Celsius

• 800 degrees Celsius

• 700 degrees Celsius

What must happen to observe a chemical property?

• The substance must be heated

• The substance must be cooled

• The substance must remain unchanged

• The substance must change

Tags

NGSS.MS-PS1-2

Which of the following is a chemical property?

• Luster

• Density

• Reactivity

• Malleability

Tags

NGSS.MS-PS1-5

What gas is produced when aluminum reacts with sodium hydroxide?

• Carbon dioxide

• Hydrogen

• Nitrogen

• Oxygen

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is an indication of a chemical reaction?

• No change in temperature

• No color change

• Production of gas and bubbles

• No change in the substance

Tags

NGSS.MS-PS1-2

What is the final test to check the flammability of hydrogen gas?

• Igniting it

• Heating it up

• Mixing it with water

• Cooling it down