Understanding Mixtures and Matter

What is a mixture?

• A single substance that cannot be separated

• Two or more substances mixed together but not chemically combined

• A substance that is chemically bonded

• A pure element

Which of the following is an example of a homogeneous mixture?

• Salad dressing

• Saltwater

• Sand and water

• Oil and water

What is a characteristic of a heterogeneous mixture?

• Uniform composition throughout

• Non-uniform composition with visible different phases

• Made of only one type of atom

• Cannot be separated into components

Which of the following is the basic unit of matter?

• Molecule

• Atom

• Element

• Compound

What is a molecule?

• A single atom

• A group of atoms bonded together

• A pure element

• A mixture of different substances

Which of the following is an example of an element?

• Water

• Salt

• Oxygen

• Sugar

What is matter?

• Anything that has mass and takes up space

• Only solid substances

• Only liquids and gases

• Only living things

Which of the following is NOT a property of matter?

• Mass

• Volume

• Color

• flammability (able to catch on fire)

What is the smallest fundamental unit of a chemical compound?

• Atom

• Molecule

• Element

• Mixture

Which of the following describes an element?

• Made up of two or more types of atoms

• Made up of only one type of atom

• A mixture of different substances

• A compound of molecules