Physical Science

Mark made a display showing some chemical changes. Which of the following describes a chemical change by heating?

• water condensing

• water evaporating from a cup

• bread dough baking

• metal screws rusting

Laura and Amy are comparing various materials. They are using the properties of size, texture, hardness, and magnetic attraction. Which types of materials are they most likely comparing?

• only liquids

• solids and liquids

• liquids and gases

• only solid

John asks his mother to help make hot cocoa. They put a pot of water on the electric stove to boil. After 10 minutes, the water begins to boil. What energy transformations have taken place?

• electrical to heat

• electrical to sound

• electrical to chemical

• electrical to physical