Unit 1 Science 7

Chemical or physical property: characteristic of a pure substance that can be observed without changing it to another substance

• chemical property

• physical property

Chemical or physical property: color

• chemical property

• physical property

Check all the PHYSICAL CHANGES:

• melting an ice cube

• burning a piece of paper

• painting a wall green

• cutting construction paper

Check all the CHEMICAL CHANGES:

• melting an ice cube

• burning a piece of paper

• cutting filter paper

• car rusting

Chemical or physical property: rust

• chemical property

• physical property

Which of the following represents the amount of matter in an object?

• density

• mass

• volume

Which of the following represents an element?

• H₂O

• HCl

• NaCl

• Au

Pure substances that are made of two or more elements chemically bonded together are known as _______________.

• elements

• mixtures

• compounds

• controls

What is the purest form of matter that cannot be broken down?

• compound

• element

• mixture

• control

A mixture where you cannot see the different parts.

• heterogeneous mixture

• homogeneous mixture