Pure Substances and Mixtures

Combination of two or more pure substances that are not chemically combined

• compound          
• atom
• mixture 
• element

 A homogeneous mixture has the same composition of particles throughout.

• True
  True
• False

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

• Water
• Mixture

 A homogeneous mixture has the same composition of particles throughout.

• True
  True
• False

A ____________ mixture has different concentrations of particles throughout. 

• Homogeneous
• Heterogeneous
• Solid
• Liquid

Water is

• a pure substance
• a mixture

Tags

NGSS.MS-PS1-4

Ocean water is a __________ mixture

• Homogeneous
• Heterogeneous

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

• Homogeneous
• Heterogenous

A magnet was placed near a pile that contained both iron and sulfur. The magnet was moved gradually closer to the pile. As it neared the pile, the magnet started attracting small pieces of iron from the pile. 
Which of these statements best describes the contents of the pile?

• It is a heterogeneous mixture of iron and sulfur that can be separated by magnetism.
• It is a solution of iron and sulfur that can be separated by magnetism.
•  It is a compound of iron and sulfur that can be separated by magnetism.
• It is a suspension of sulfur in iron that can be separated by magnetism.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Water is

• a pure substance
• a mixture

Tags

NGSS.MS-PS1-4