Quick Check #1 2025-Pure Substances and Mixtures

What is the smallest unit of matter

• Mixture

• Atom

• Compound

• Substance

Tags

NGSS.MS-PS1-1

This is made up of one or more of the SAME kind of atom

• Element
• Mixture
• Compound
• Matter

Tags

NGSS.MS-PS1-1

What material is a pure substance?

• alloy

• compound

• homogeneous

• mixture

Tags

NGSS.MS-PS1-4

DIFFERENT kinds of atoms chemically combined to form a substance are

• Mixture
• Element
• Compound
• Substance

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

This contains a variety elements and compounds that ARE NOT chemically combined.

• Water
• Mixture
• Elements
• Compounds

A mixture is what is obtained when two substances are combined in such a way that a chemical reaction between the components does not occur. A solution is a mixture that looks exactly the same everywhere. Which of these mixtures is not a solution?

• a glass of apple juice

• a mixture of salt and water

• a chocolate chip cookie

• a mixture of sugar and water

 A homogeneous mixture has the same composition of particles throughout.

• True
• False

One difference between mixtures and pure substances is that

• mixtures can be physically separated

• mixtures are made up of one atom

• pure substance can be physically separated

• pure substance do not have chemical bonds

Alex goes into the garden and digs up a shovel full of dirt and twigs. This is a _____________ mixture.

• homogeneous

• heterogeneous

• pure substance

• elemental

Mixtures are produced when two or more materials are combined and each material maintains its own properties. All of the following are mixtures EXCEPT

• pizza

• salad

• water

• chocolate