Pure Substance and Mixture Pretest

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

Of these mixtures, which one is a solution?

• A
• B
• C
• D

In this picture, which represents atoms?

• A
• B
• C

Tags

NGSS.MS-PS1-1

In this picture, which one represents a compound?

• A
• B
• C

Tags

NGSS.MS-PS1-1

Of these mixtures, which one is a suspension?

• A
• B
• C

How could you break down the compound calcium carbonate into the elements that make it up?

• by melting
• by crushing
• with a filter
• with chemical changes

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of these substances is a compound?

• chlorine
• nitrogen
• uranium
• ammonia

Tags

NGSS.MS-PS1-1

Which is the best set of tools to use for separating a mixture of water, sugar, and pebbles?

• a filter and a magnet
• a filter and a hot plate
• a magnet and a hot plate
• a settling tank and a filter

What is a homogeneous mixture?

• a mixture that is the same throughout.
• a mixture that is made up of one type of atom.
• a mixture that is made up of one type of compound
• a mixture that cannot be separated through physical changes

An example of a compound would be:

• hydrogen gas (H₂)
• heterogeneous
• sodium chloride (NaCl)
• oxygen gas (O₂)

Tags

NGSS.MS-PS1-1