Unit 2 Review

The __________________ properties of a substance can be observed or measured without chemically changing the substance.

• Chemical

• Physical

Anything that has mass and takes up space is called _________________________.

• Mass

• Volume

• Matter

• Molecules

Which subatomic parts of an atom move around the outside of the nucleus?

• Protons

• Neutrons

• Electrons

Rust forming on a car left outside is an example of a _____________________________ change.

• Physical

• Chemical

• Element

• Molecule

• Compound

• Both- Molecule & Compound

The following are signs that a ______________ reaction has occurred: gas is produced, a color change occurs, or if heat or light are produced.

• Physical

• Chemical

The state of matter in which the particles spread apart, fill ALL the space available to them, and have high thermal energy is the _____________________________ state.

• Solid

• Liquid

• Gas

Luster, odor, electrical conductivity, and melting point are all examples of a ______________________ property.

• Physical

• Chemical

Atoms are made of what subatomic particles? Check all that apply.

• Protons

• Neutrons

• Positive

• Electrons

Pure substances that CANNOT be broken down chemically or physically into other substances are called ______________________________.

• Elements

• Compounds

• Molecules