Pure Substances and Mixtures Review

Which property describes only heterogeneous mixtures? 

• can be separated by physical means

• can contain elements and/or compounds

• can contain more than one liquid substance

• can be made of substances in different states of matter.

Becca adds three drops of food coloring to a beaker or water. As she stirs the water, the appearance of the mixture becomes the same throughout the beaker. Which type of mixture did Becca make? 

• colloid

• solution

• suspension

• heterogeneous

What is the major difference between a compound and a mixture?

• Mixtures are chemically bonded atoms

• Mixtures are made up of the same element

• Compounds are chemically bonded atoms

• Compounds are made up of the same element.

A _____________ contains a variety of elements and compounds that are not chemically combined with each other.

• compound

• element

• molecule

• mixture

Fruit Loops, pizza, and Skittles are examples of ____________________ mixtures.

• heterogeneous

• homogeneous

• pure

Coffee, mouthwash, and vinegar are examples of __________________ mixtures.

• heterogeneous

• homogeneous

• pure

Which of these is an element?

• Salt (NaCl)

• Water (H20)

• Oxygen (O)

• Carbon Dioxide (CO2)

Which of these is a compound?

• Aluminium (Al)

• Carbon Dioxide (CO2)

• Nitrogen (N)

• Sand

Tags

NGSS.MS-PS1-1

Which of the following is true about acids and bases?

• The lower the pH, the stronger the acid
• the higher the pH, the stronger the acid
• The lower the pH, the more neutral the acid
• The higher the pH, the weaker the base

On the pH scale what numbers are bases?

• 8-14
• 0-7
• 7
• 1