Classification of Matter Notes

Multiple Choice

Which of the following best describes a mixture?

• A substance with a fixed composition

• A substance where all particles are identical

• Two or more substances physically combined

• A substance that cannot be separated

Open Ended

Why is it important to understand the classification of matter in science?

Multiple Choice

Which of the following best describes an element?

• A substance made of two or more types of atoms chemically combined

• A substance in which all atoms are alike

• A mixture of different substances

• A substance that cannot be broken down by chemical reactions

Open Ended

Explain the difference between elements that exist as individual atoms and those that exist as molecules of two atoms bonded together.

Multiple Select

Which of the following are examples of compounds?

• Helium

• Water (H2O)

• Oxygen (O2)

• Table Salt (NaCl)

Open Ended

How do the properties of compounds differ from the properties of the elements that make them up?

Multiple Choice

Which statement about molecules is correct?

• Molecules are always made of different kinds of atoms.

• Molecules are groups of atoms chemically bonded together.

• Molecules cannot be formed from elements.

• Molecules are only found in compounds.

Multiple Choice

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

• Salad dressing

• Bleach

• Cereal

• Paint

Open Ended

Compare the characteristics of homogeneous and heterogeneous mixtures using examples from the images.

Multiple Select

Which of the following statements are true about pure substances?

• They have unique properties.

• They are always mixtures.

• Their identity can be determined by their properties.

• They contain multiple types of atoms.

Multiple Choice

Which of the following best describes a heterogeneous mixture?

• Even distribution of components

• Appears blended

• Components are easy to see

• Same throughout

Open Ended

Explain the difference between a solute and a solvent in a solution, and give an example.