Properties and Changes of Matter

The video tutorial covers the concept of matter, its properties, and changes. It begins with an introduction to matter, defining it as anything with mass and space. The tutorial then explores physical properties like state, viscosity, and conductivity, followed by chemical properties such as flammability and reactivity. It distinguishes between physical and chemical changes, providing examples for each. The video concludes with the law of conservation of mass, explaining that mass is neither created nor destroyed in chemical reactions.

What is the primary characteristic that defines matter?

• It has mass and occupies space.

• It can conduct electricity.

• It can change state.

• It has color.

Which of the following is NOT a physical property of matter?

• Flammability

• Density

• Viscosity

• Malleability

What does malleability refer to in terms of physical properties?

• The ability to be hammered into thin sheets

• The ability to be stretched into a wire

• The ability to dissolve in water

• The ability to conduct electricity

Which of the following is a chemical property?

• Color

• Boiling point

• Reactivity

• Texture

What happens to a substance during a chemical change?

• It changes its state but remains the same substance.

• It changes into a completely new substance.

• It changes its shape but not its identity.

• It changes its color but not its composition.

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

• Burning wood

• Rusting iron

• Melting ice

• Baking a cake

What is a sign that a chemical change has occurred?

• The substance evaporates.

• The substance is cut into pieces.

• The substance melts.

• The substance changes color.

What does the law of conservation of mass state?

• Mass increases during chemical reactions.

• Mass is conserved and remains constant.

• Mass is lost during chemical reactions.

• Mass can be created and destroyed.

In the context of the law of conservation of mass, what does 'conserve' mean?

• To increase

• To save

• To destroy

• To create

If you combine two substances and the mass of the reactants is 5 grams, what will be the mass of the products according to the law of conservation of mass?

• 3 grams

• 10 grams

• 7 grams

• 5 grams