Law of Conservation of Mass Vocabulary Test

Match the following vocabulary terms with the correct definition

• mass

• a substance made of only one type of atom that cannot be broken down into simpler substances

• matter

• anything that has mass and takes up space

• element

• the basic unit of matter (smallest particle of an element)

• atom

• the amount of matter in an object

Match the following vocabulary terms with the correct definition

• molecule

• a force of attraction that hold atoms together in a molecule

• compound

• to save or hold; start and end with the same amount

• Law of Conservation of Matter or Mass

• a group of atoms bonded together

• conserve

• Matter is neither created nor destroyed during a chemical reaction; atoms are only rearranged

• chemical bond

• a substance made up of atoms of two or more different elements chemically combined

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

Match the vocabulary terms to the correct definition

• chemical equation

• a combination of chemical symbols (letters) and numbers to represent a substance; tells us the type and number of elements in the substance

• chemical formula

• the process by which one or more substances change to produce one or more different substances

• chemical reaction

• a representation of a chemical reaction the uses symbols to show the relationship between reactants and products

• chemical symbol

• one or two letters that represent an element; sometimes derived from Greek or Latin words

Tags

NGSS.MS-PS1-5

Match the following vocabulary terms to the correct definition

• balanced equation

• a substance that changes the rate of a chemical reaction or speeds up the reaction

• catalyst

• 
• Yield or Produce

• an equation where the number of atoms on the left side equals the number of atoms on the right side of the equation

Tags

NGSS.MS-PS1-5

Match the vocabulary terms to the correct definition

• reactants

• starting substance in a chemical reaction that reacts with another

• products

• small number to the right of chemical symbols that tells the number of atoms of that element

• subscript

• big number in front of a chemical formula identifying the number of molecules

• coefficient

• a substance that is formed as the result of a chemical reaction

Tags

NGSS.MS-PS1-2

4. The law of conservation of mass can be demonstrated by a chemical reaction. Which of the following chemical reaction models best represents the law of conservation of mass?

• 
• 

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The Law of Conservation of Mass states that the total mass of the reactants should be

• More than the mass of the products

• Equal to the mass of the products

• Ignored during the reaction

• Less than the mass of the products

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5