Chemistry Semester

The study of matter and its changes is called

• Biology

• Chemistry

• Physics

• None of the above

The smallest unit of an element that retains the properties of that element is called a(n)

• Element

• Compound

• Atom

• Molecule

Which of the following is NOT a pure substance?

• Element

• Compound

• Mixture

• Molecule

Helium is used in balloons because it is

• Reactive to rubber

• Lighter than air

• Flammable

• A colored gas

Which of the following is NOT a potential sign of chemical change?

• Change in odor

• Boiling

• Fizzing

• Change in color

Which of the following causes a chemical change?

• Moving

• Melting

• Burning

• Shattering

Which of the following is an element?

• Steel

• Brass

• Bronze

• Iron

Unlike a mixture, a pure substance has

• Atoms

• Molecules

• A specific size

• A fixed composition

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

• Ice melting

• Paint fading

• Pounding gold into a coin

• A puddle evaporating

Which of the following is a homogeneous mixture?

• Diamond

• Milk

• Sulfuric Acid

• Iron