Classifying Matter: Elements, Compounds, and Mixtures

What are the three main groups into which matter is classified?

• Metals, Non-metals, Metalloids

• Atoms, Molecules, Ions

• Elements, Compounds, Mixtures

• Solids, Liquids, Gases

Which of the following is a characteristic of pure substances?

• They have varying chemical properties.

• They can be separated by physical means.

• They have definite chemical and physical properties.

• They are always mixtures of elements.

What is the simplest form of matter that cannot be broken down by chemical or physical means?

• Mixture

• Compound

• Element

• Solution

Which of the following statements is true about compounds?

• They are made up of one type of atom.

• They are always in the solid state.

• They can be separated by physical means.

• They have a specific ratio of elements.

Tags

NGSS.MS-PS1-1

How can mixtures be separated?

• By chemical reactions

• By physical means

• By nuclear reactions

• By electrolysis

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

• Burning wood

• Rusting iron

• Boiling water

• Digesting food

What is a key difference between mixtures and compounds?

• Mixtures retain the properties of their components.

• Compounds are not chemically bonded.

• Mixtures have a definite composition.

• Compounds can be separated by physical means.

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

• Chocolate chip cookie

• Salad

• Granite

• Salt water

What is a characteristic of heterogeneous mixtures?

• They have uniform composition throughout.

• They are always in the liquid state.

• Their composition varies from one part to another.

• They cannot be separated by physical means.

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

• Kool-aid

• Dirt

• Milk

• Air