The video tutorial covers the properties of matter, including physical and chemical properties, and their changes. It explains extensive and intensive physical properties, and how chemical properties describe a substance's reactivity. The tutorial also discusses physical changes, which do not alter the composition, and chemical changes, which result in new substances. Finally, it explains the law of conservation of mass, demonstrating that mass is neither created nor destroyed in chemical reactions.

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

• Corrosiveness

• Density

• Reactivity with acid

• Flammability

What type of property is dependent on the amount of matter present?

• Chemical property

• Intensive property

• Physical property

• Extensive property

Which of the following describes a chemical property?

• Color

• Magnetism

• Flammability

• Boiling point

What happens when iron reacts with oxygen?

• It forms iron oxide

• It forms water

• It forms hydrogen gas

• It forms carbon dioxide

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following is a reversible physical change?

• Burning paper

• Melting ice

• Rusting iron

• Cooking an egg

What is an example of an irreversible physical change?

• Cracking an egg

• Freezing water

• Dissolving sugar in water

• Melting wax

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

• Dissolving

• Change in shape

• Formation of a precipitate

• Change in state

Tags

NGSS.MS-PS1-2

What is produced when sodium hydrogen carbonate reacts with acid?

• Carbon dioxide gas

• Water

• Oxygen gas

• Hydrogen gas

Tags

NGSS.MS-PS1-2

According to the law of conservation of mass, what happens to mass during a chemical reaction?

• It is converted to energy

• It remains the same

• It is destroyed

• It is created

Tags

NGSS.MS-PS1-5

In a reaction where 100 grams of magnesium reacts with 15 grams of oxygen, what is the mass of the magnesium oxide formed?

• 120 grams

• 85 grams

• 100 grams

• 115 grams

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5