Understanding Chemical Reactions

What is a chemical reaction?

• A process where energy is absorbed

• A process where one or more substances undergo change to produce different substances

• A shorthand notation for a compound

• A description of a chemical reaction using symbols

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following best describes a chemical formula?

• A process where substances change into different substances

• A shorthand description of a chemical reaction

• A shorthand notation for a compound or a molecule using chemical symbols and numbers

• The starting materials in a chemical reaction

Tags

NGSS.MS-PS1-1

What are reactants in a chemical reaction?

• The substances formed from a chemical reaction

• The energy released during a reaction

• The starting materials in a chemical reaction

• A shorthand notation for a compound

Tags

NGSS.MS-PS1-1

Which of the following is true about an exothermic reaction?

• Energy is absorbed

• Energy is released or removed

• Mass is created

• Mass is destroyed

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-4

What does the law of conservation of matter (mass) state?

• Mass can be created during a chemical reaction

• Mass can be destroyed during a chemical reaction

• Mass remains the same before and after a chemical reaction

• Energy is absorbed during a chemical reaction

Tags

NGSS.MS-PS1-5

What is a chemical equation?

• A process where energy is absorbed

• A shorthand description of a chemical reaction using chemical formulas and symbols

• The substances formed from a chemical reaction

• The starting materials in a chemical reaction

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

In an endothermic reaction, what happens to energy?

• Energy is released

• Energy is absorbed

• Energy is destroyed

• Energy is created

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

What are products in a chemical reaction?

• The starting materials in a chemical reaction

• The substances formed from a chemical reaction

• A shorthand notation for a compound

• A process where energy is absorbed

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

Which of the following is an example of a chemical formula?

Tags

NGSS.MS-PS1-1

Which of the following represents a chemical equation?

Tags

NGSS.MS-PS1-1