properties of matter

Which of the following is a pure substance?

• Salt water
• Air
• Soil
• Gold

What is an element?

• A type of compound
• A type of mixture
• A substance that cannot be broken down into simpler substances
• A type of molecule

What is a compound?

• A substance formed by the chemical combination of two or more elements in definite proportions
• A substance formed by the physical combination of two or more elements in any proportion
• A substance formed by the chemical combination of two or more elements in any proportion
• A substance formed by the physical combination of two or more elements in definite proportions

What is a mixture?

• A substance made by mixing other substances together
• A single substance that cannot be separated into other substances
• A substance that has a fixed composition and distinct properties
• A substance that cannot be broken down into simpler substances

Which of the following is an example of an element?

• Water
• Air
• Oxygen
• Soil

Which of the following is an example of a mixture?

• Water
• Salt
• Air
• Iron

What is the smallest unit of an element?

• Molecule
• Compound
• Atom
• Electron

What is the smallest unit of a compound?

• Molecule
• Atom
• Element
• Compound

What is the smallest unit of a mixture?

• Molecule
• Atom
• Compound
• Element

Which of the following is an example of a compound?

• Iron
• Oxygen
• Water
• Helium