Honors Physical Science 3rd Quarter Graded Assignment

The red numbers in the image below represent ________

• subscripts
• coefficients
• I don't know, and don't want to try
• None of the answers are correct

The blue numbers in the image below represent ________

• I don't know, and don't want to try
• coefficients
• subscripts
• none of the answers are correct

What does the Law of Conservation of Mass state?

• Matter cannot be gained or lost in a chemical reaction, only changed.

• Matter can only be lost in a chemical reaction.

• Matter can only be gained in a chemical reaction.

• Matter can be gained and lost in a chemical reaction.

Heating up two reactants will make the reaction...

• stay the same
• go slower
• become constant
• go faster

The energy needed to start a chemical reaction is the _____________________.

• Activation Energy
• Products
• Reactants
• Enzymes

A new substance is formed in a chemical reaction.

• True

• False

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What type of reaction is the following:
 $2KI\ ->\ 2K\ +\ I_2$  

• Synthesis

• Decomposition

• Single Replacement

• Double Replacement

What type of reaction is the following:
 $Zn\ +\ 2HCl\ ->\ ZnCl_2+H_2$ 

• Synthesis

• Decomposition

• Single Replacement

• Double Replacement

What type of reaction is the following:
 $Na_2S\ +2HCl\ ->\ H_2S+2NaCl$ 

• Synthesis

• Decomposition

• Single Replacement

• Double Replacement

What type of reaction is the following:
 $2H_2+O_2->2H_2O$  

• Synthesis

• Decomposition

• Single Replacement

• Double Replacement