Lesson 2 Outline (Matter and its changes)

Matter changes with the season, including changes in the___________ of leaves and in the___________ of the air.

• Physical change, chemical change

• Solubility, density

• Temperature, color

• Energy, rate

Matter can change in many ways, including____________ changes and____________ changes.

• Gas, solid

• Physical, chemical

• Temperature, energy

• Color, physical

In a physical change, the___________ of the substance does not change.

• Identity

• Dissolving

• Color

• The form

________ one substance in another does not change the identities of the substance.

• The mass of

• Mixing

• Foraging

• Dissolving

The formation of ice on the surface of a lake is an example of a(n)___________.

• Energy

• Change instate

• Rate

• Color

Changes in state involve changes in the amount of________ that the particles in a substance have

• Heat

• Energy

The __________ at which one state of matter changes into another depends on how much energy is added or taken away from the substance.

• Rate

• Mass

• Identity

In a chemical change, the substances that make up matter change into another substance with___________ physical properties and chemical properties.

• Release of

• Rate of

• Equal

• Different

Changes in___________,density,and state of matter can be signs of a chemical change

• Color

• Solubility

• form

• state of matter

The formation of a(n)___________ substance is the only sure sign of a chemical change.

• Old

• New