Elements, Compounds and Mixtures Review

Which substance is comprised of more than one element?

• helium

• aluminum

• silver

• steel

Tags

NGSS.MS-PS1-1

Each ball shown in the diagram represents a type of atom. Balls of the same shade and size represent the same kind of atom. Which diagram shows a mixture?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-1

Ammonia is made up of two pure substances: nitrogen and hydrogen. What can be true for ammonia, nitrogen, and hydrogen?

• Ammonia is a mixture, and nitrogen and hydrogen are elements.

• Ammonia is a mixture, and nitrogen and hydrogen are compounds

• Ammonia is a compound, and nitrogen and hydrogen are elements.

• Ammonia is an element, and nitrogen and hydrogen are compounds.

Tags

NGSS.MS-PS1-1

The image shows the atomic arrangements of four different substances. Which are compounds and why?

• hydrogen because it contains only one kind of atom

• methane because it contains the maximum number of molecules

• water and carbon dioxide because each contains a similar number of molecules

• water, carbon dioxide, and methane because each contains more than one element

Tags

NGSS.MS-PS1-1

Water, a stable liquid, is formed when two flammable gases, hydrogen and oxygen, combine. What has happened?

• An atom has been created.

• A compound has been created.

• A mixture has been created.

• An element has been created.

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Jamie poured a mixture of sand and salt water into a beaker through a funnel lined with filter paper. What will be found in the beaker after filtering?

• salt only

• sand only

• salt and water

• salt and sand

Tags

NGSS.MS-PS1-2

Which is an example of a homogeneous mixture?

• air

• soil

• silver

• water

The table shows two sets of substances. Which terms best identify both sets?

• Set 1: compounds; Set 2: elements

• Set 1: elements; Set 2: compounds

• Set 1: elements and compounds; Set 2: elements

• Set 1: compounds; Set 2: elements and compounds

Tags

NGSS.MS-PS1-1

Two students are working in the laboratory with a mixture of sand and water. Which piece of equipment should the students use to separate the mixture?

• 
• 
• 
• 

What is H₂SO₄ 
 made up of?

• 2 hydrogen, 1 sulfur, 4 oxygen
• 1 hydrogen, 2 sulfur, 4 oxygen
• 2 hydrogen & 4 sodium
• 1 hydrogen & 6 sodium

Tags

NGSS.MS-PS1-1