Modeling Chemical Reactions

The ___________ states that matter is neither created nor destroyed during a chemical reaction.

• Law of Conservation of Mass

• Open System

• Closed System

• Chemical Equation

Tags

NGSS.MS-PS1-5

In a(n) __________ , like photosynthesis, it is difficult to measure the movement of matter because of how easily it can enter and escape.

• open system

• closed system

• chemical equations

• chemical formula

Tags

NGSS.MS-LS1-6

In a(n) __________ , like a scientific lab, it is easier to measure the movement of matter because scientists can measure and analyze the contents of the system.

• open system

• closed system

• chemical equations

• chemical formula

Tags

NGSS.MS-PS1-2

A __________ combines the symbols of different elements to represent molecules, for example H₂0.

• chemical formula

• chemical equation

• synthesis

• decomposition

A __________ indicates the substances involved in a chemical reaction and the substances that are formed as a result of the chemical reaction.

• chemical formula

• chemical equation

• synthesis

• decomposition

During __________ , two or more elements or compounds combine to make a more complex substance.

• chemical formula

• chemical equation

• synthesis

• decomposition

During __________ , compounds break down into simpler products.

• chemical formula

• chemical equation

• synthesis

• decomposition

In this chemical equation, where are the reactants located?

• the reactants are on the left side in the equation

• the reactants are on the right side of the equation

Tags

NGSS.MS-PS1-2

In this chemical equation, where are the products located?

• the products are on the left side in the equation

• the products are on the right side of the equation

How many atoms of each element are in this molecule of ammonia?

• There is 1 nitrogen atom and 3 hydrogen atoms

• There are no nitrogen atoms and 3 hydrogen atoms

• There are 3 nitrogen atoms and 3 hydrogen atoms

Tags

NGSS.MS-PS1-1