Chemistry Unit

Which list of states of matter is in the correct order, from the phase with the slowest molecular  movement to the phase with the fastest molecular movement.

•  Solid, liquid, gas
• Solid, gas, liquid
• Liquid, gas, solid
• Gas, liquid, solid

Tags

NGSS.MS-PS1-4

What is the definition of the conservation of mass?

• a.  Reactants have more atoms than products
• a.  Products have more atoms than reactants
• a.  Reactant and products have the same number of atoms
• a.  Reactants have more atoms than the products

Tags

NGSS.MS-PS1-5

Which of the following best explains the relationship between molecules and atoms?

• Molecules are atoms that have no mass.
• Molecules are made up of two or more atoms.
• Atoms have smaller parts, called molecules.
• Atoms are molecules that have a charge.

Tags

NGSS.MS-PS1-1

What are the 3 parts of an atom?

• Product, Reactant, Mass
• Positive, neutral, negative
• Proton, nucleus, electron
• Proton, neutron, electron

How many atom are in the following molecule?
 KCrO₄

• 7
• 6
• 12
• 9

Tags

NGSS.MS-PS1-1

           2H₂O₂ = 2H₂O +O₂   
             100g            ?       

• 50g
• 200g
• 25g
• 100g 

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Label as a chemical or physical change:
Boiling

• Chemical 
• Physical

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Label as a chemical or physical change:
Burning wood

• Chemical 
• Physical

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS1-5

Which is NOT evidence a chemical reaction occurred?

• Precipitate
• Color change
• Phase change
• Gas produced

Tags

NGSS.MS-PS1-2

Which of the following substances are elements?

• water

• salt

• carbon dioxide

• hydrogen