1. Lesson 1 Reading Guide - KC
Understanding Chemical Reactions
What are some signs that a chemical reaction might have occurred?
What happens to atoms during a chemical reaction?
What happens to the total mass in a chemical reaction?
Lesson 1 Reading Guide - KC

2. Lesson 1 Reading Guide - Vocab
Understanding Chemical Reactions
chemical reaction
chemical equation
reactant
product
law of conservation of mass
coefficient
Lesson 1 Reading Guide - Vocab

3. A chemical reaction is a process in which bonds break and atoms rearrange, forming new bonds.
Lesson 1 - VS

4. A chemical equation uses symbols to show reactants and products of a chemical reaction.
Lesson 1 - VS

5. The mass and the number of each type of atom do not change during a chemical reaction. This is the law of conservation of mass.
Lesson 1 - VS

6. Which term refers to a description of a reaction using element symbols and chemical formulas?
A. chemical equation
B. chemical reaction
C. coefficient
D. subscript
Lesson 1 – LR1

7. What are substances produced by a chemical reaction called?
A. reactants
B. products
C. element
D. coefficient
Lesson 1 – LR2

8. What is conserved when mass is conserved in a reaction?
A. substances
B. products
C. coefficients
D. atoms
Lesson 1 – LR3

9. Lesson 2 Reading Guide - KC
Types of Chemical Reactions
How can you recognize the type of chemical reaction by the number or type of reactants and products?
What are the different types of chemical reactions?
Lesson 2 Reading Guide - KC

10. Lesson 2 Reading Guide - Vocab
Types of Chemical Reactions
synthesis
decomposition
single replacement
double replacement
combustion
Lesson 2 Reading Guide - Vocab

11. Chemical reactions are classified according to patterns seen in their reactants and products.
Lesson 2 - VS

12. In a synthesis reaction, there are two or more reactants and one product. A decomposition reaction is the opposite of a synthesis reaction.
Lesson 2 - VS

13. In replacement reactions, an element, or elements, in a compound is replaced with another element or elements.
Lesson 2 - VS

14. What term describes a type of chemical reaction in which two or more substances combine and form one compound?
A. single-replacement
B. double-replacement
C. combustion
D. synthesis
Lesson 2 – LR1

15. In which type of chemical reaction does a substance combine with oxygen and release energy?
A. synthesis
B. combustion
C. single-replacement
D. double-replacement
Lesson 2 – LR2

16. Which term refers to a chemical reaction in which the negative ions in two compounds switch places, forming two new compounds?
A. double-replacement
B. single-replacement
C. decomposition
D. synthesis
Lesson 2 – LR3

17. 4. Water can be broken down into simpler substances.
Do you agree or disagree?
3. Reactions always start with two or more substances that react with each other.
4. Water can be broken down into simpler substances.
Lesson 2 - Now

18. Lesson 3 Reading Guide - KC
Energy Changes and Chemical Reactions
Why do chemical reactions always involve a change in energy?
What is the difference between an endothermic reaction and an exothermic reaction?
What factors can affect the rate of a chemical reaction?
Lesson 3 Reading Guide - KC

19. Lesson 3 Reading Guide - Vocab
Energy Changes and Chemical Reactions
endothermic
exothermic
activation energy
catalyst
enzyme
inhibitor
Lesson 3 Reading Guide - Vocab

20. Which term refers to a number placed in front of an element symbol or chemical formula in an equation?
A. subscript
B. reactant
C. product
D. coefficient
Chapter Review – MC1

21. Which term refers to the substances produced by a chemical reaction?
A. reactants
B. products
C. elements
D. atoms
Chapter Review – MC2

22. What can be changed when balancing a chemical equation?
A. coefficients
B. elements
C. subscripts
D. superscripts
Chapter Review – MC3

23. In what type of chemical reaction does one compound break down and form two or more substances?
A. combustion
B. decomposition
C. synthesis
D. double-replacement
Chapter Review – MC4

24. Which term refers to the type of chemical reaction that absorbs thermal energy?
A. endothermic
B. exothermic
C. double-replacement
D. single-replacement
Chapter Review – MC5

25. Which term refers to a process in which atoms of one or more substances rearrange to form one or more new substances?
A. chemical equation
B. chemical reaction
C. combustion
D. coefficient
Chapter Review – STP1

26. Which rearranges when chemical bonds between atoms break?
A. atoms
B. ions
C. products
D. reactants
Chapter Review – STP2

27. In which type of chemical reaction does one element replace another element in a compound?
A. single-replacement
B. double-replacement
C. synthesis
D. combustion
Chapter Review – STP3

28. Which term refers to a substance that increases reaction rate by lowering the activation energy of a reaction?
A. catalyst
B. enzyme
C. inhibitor
D. product
Chapter Review – STP4

29. Which describes a catalyst that speeds up chemical reactions in living cells?
A. enzyme
B. inhibitor
C. particle
D. reactant
Chapter Review – STP5