Law of Conservation of Matter

What does the Law of Conservation of Matter state?

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

• 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.

Tags

NGSS.MS-PS1-5

Matter is anything that

• takes up space and has mass.
• is in our universe.
• is light, sound or ideas.

What tool might a scientist use to demonstrate the Law of Conservation of Matter?

• ruler
• beaker
• thermometer
• balance scale

Tags

NGSS.MS-PS1-5

What is the part of the chemical equation in green called?

Fe + S → FeS

• products

• reactants

• yield

• input

What is the right part of a chemical equation called...

2H_{2 +} O₂ --> 2H₂O

• Reactants

• Products

• Yields

• Output

How many different elements are in C₆H₁₂O₆?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-1

An oreo cookie weighs 20 grams.  It gets crushed into crumbs for a recipe.  How much do its crumbs weigh?

• 15 grams
• 25 grams
• 20 grams

Tags

NGSS.HS-PS1-7

The total amount of matter (atoms) before and after a chemical reaction (change), remains the same.

• True
• False

Tags

NGSS.MS-PS1-5

This is used to represent the number of each atom being represented.

• A Exponent

• The Coefficient

• A Molecule

• The Subscript

A chemical reaction is balanced when

• both sides have the same elements

• both sides have the same number of atoms

• both sides have the same subscripts

• the molecules are the same on each side