Practice Questions for unit 2 test

Made up of two or more elements.

• solute
• compound
• atom
• molecule

Tags

NGSS.MS-PS1-1

Which choice best describes the properties of group 1 on the periodic table

• they are nonreactive metals

• they are highly reactive metals

• they are metalloids

• they are highly reactive nonmetals

Which of the following chemical equations is balanced

• H₂ + O₂ → H₂O

• 3Al + Fe₃ → 3FeAl

• 2Mg + O₂ → 2MgO

Tags

NGSS.MS-PS1-5

Which type of matter can be separated by physical means?

• atom

• element

• compound

• mixture

A balanced chemical equation represents

• Law of Conservation of Energy

• Law of Conservation of Mass

• Law of Superposition

• Law of Gravity

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The circles in Box A represent pure substances that cannot be broken down into a simpler form. What are these substances? 

• elements
• compounds
• mixtures
• solutions

Tags

NGSS.MS-PS1-1

Which observation would indicate that the material is a mixture?

• The material has different colored crystals

• The material does not dissolve completely in water.

• The material does not melt when it is heated over a burner.

• The material reacts with an acid solution to form bubbles of gas.

A student passes a magnet over a powder. some of the powder sticks to the magnet, while some does not. Which of these identifies the substance?

• element

• compound

• mixture

• solution

What number and types of atoms occur in the following formula unit? CaNe₂0₃

• 1 calcium atom, 2 nitrogen atoms, and 6 oxygen atoms

• 1 carbon atom, 1 nitrogen atom, and 3 oxygen atoms

• 1 calcium atom, 2 neon atoms, and 3 oxygen atoms

• 1 carbon atom, 1 neon atom, and 6 oxygen atoms

Tags

NGSS.MS-PS1-1

A piece of limestone is dropped into an acid solution and carbon dioxide gas is released. What has happened?

• only a physical change occurred.

• a chemical change occurred.

• only a loss of mass occurred.

• the formation of an element occurred.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5