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Types of Chemical Reactions

Tenth graders learn to classify chemical reactions into five major types — synthesis, decomposition, combustion, single replacement, and double replacement — recognizing patterns that let them predict products.

Grade 10Reactions55 minutes1 class period5E ModelExplicit teaching4 StandardsNGSS
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Lesson at a Glance

Everything you need before the bell rings

Learning Objectives

Students will be able to…

  • ✓Identify synthesis and decomposition.
  • ✓Identify combustion.
  • ✓Identify replacement reactions.
  • ✓Classify a reaction by pattern.
Essential Question

Millions of chemical reactions happen — but nearly all fit into just a few patterns. What are the main types of reactions, and how can spotting the pattern help you predict what forms?

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Lesson Phases
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Vocabulary Terms
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Standards Aligned
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Interactive Task
Match It · Interactive

Match the Reaction Type

Project this and match each reaction type to its pattern — tap the type, then tap its description.

⚗️ Match each reaction type to its patternTry it
Reaction Type
Pattern
Tap a type, then tap its pattern!
The Lesson · 5E Instructional Model (Engage · Explore · Explain · Elaborate · Evaluate)

55 minutes, five moves

Tap any phase to open the teacher moves and student actions.

1

Engage — Patterns in Reactions

5 min

Millions of reactions — but only a few patterns. What are they?

👩‍🏫 Teacher Moves

  • Show several reactions.
  • Ask what patterns appear.
  • Pose the question.

🎒 Student Actions

  • See the reactions.
  • Look for patterns.
  • Predict types.
2

Explore — Explore the Types

12 min

Students investigate.

👩‍🏫 Teacher Moves

  • Send students to Match the Reaction Type.
  • Note each pattern.
  • Sort by type.

🎒 Student Actions

  • Match them.
  • Note patterns.
  • Sort them.
3

Explain — Five Types

13 min

Students explain.

👩‍🏫 Teacher Moves

  • Explain synthesis/decomposition.
  • Explain combustion.
  • Explain replacement types.

🎒 Student Actions

  • Explain first two.
  • Explain combustion.
  • Explain replacements.
4

Elaborate — Predict Products

15 min

Students elaborate.

👩‍🏫 Teacher Moves

  • Classify new reactions.
  • Predict the products.
  • Explain the pattern.

🎒 Student Actions

  • Classify them.
  • Predict products.
  • Explain it.
5

Evaluate — Evaluate

5 min

Students conclude.

👩‍🏫 Teacher Moves

  • Classify a reaction.
  • Explain its type.
  • Hand out the exit ticket.

🎒 Student Actions

  • Classify it.
  • Explain it.
  • Complete the exit ticket.
Standards Alignment

Built to the standards you report on

Aligned to the Next Generation Science Standards (High School Physical Science / Chemistry).

NGSS
HS-PS1-2

Construct and revise an explanation for the outcome of a reaction based on patterns.

NGSS
HS-PS1-7

Use mathematical representations to show mass is conserved.

NGSS
HS-PS1-4

Develop a model to explain energy change in reactions.

NGSS
SEP-6

Constructing explanations.

Differentiation

One lesson, every learner

Multilingual Learners

ELL / EMERGING READERS
  • Reaction-type pattern cards.
  • Sentence frame: “This is ___ because ___.”
  • Use color-coded equations.

Support & Access

IEP / 504
  • Start with synthesis vs. decomposition.
  • Use A + B patterns.
  • Match one pair at a time.

Stretch & Extend

GIFTED / EARLY FINISHERS
  • Predict products of a replacement.
  • Use an activity series.
  • Balance each reaction type.
Materials

What to gather

  • 📽️Projector / board
  • 🧪Reaction demos
  • 💻Match the Reaction Type
  • 📄Equation cards
  • ✏️Pencils
  • 🎫Exit-ticket slips
Vocabulary

Key terms — hover for a quick definition

chemical reactiona process forming new substancessynthesiscombining into one productdecompositionbreaking into simpler substancescombustionburning with oxygensingle replacementone element replaces anotherdouble replacementtwo compounds swap partnersreactanta starting substanceproducta substance formed
Evaluate

Exit Ticket

Preview the three formative checks. Tap “Sample answer” to see what mastery looks like — hide them before you print for students.

QUESTION 1
What happens in a synthesis reaction?
Two or more substances combine to form one product (A + B → AB).
QUESTION 2
What type of reaction is fuel + O₂ → CO₂ + H₂O?
Combustion.
QUESTION 3
In a double-replacement reaction, what do the two compounds do?
They swap partners (AB + CD → AD + CB).

Elaborate: predict the products.

Have students use an activity series to predict whether a single-replacement reaction will occur and what products form. A printable reaction-types sheet is in the Science library.

Study · Flashcards

Study the key terms

Tap a card to flip it, then rate whether you knew it. Built from this lesson’s vocabulary.

🃏 Types of Chemical ReactionsFlip
Card 1
Term
Tap to flip →
Meaning
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Practice · Quiz

Check your understanding

A quick self-check with instant feedback, drawn from this lesson’s key terms.

📝 Types of Chemical ReactionsQuiz
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Question 1
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Practice · Worksheet

Printable worksheet

A print-and-go review sheet with a built-in answer key. Tap “Show answer key” to reveal answers, or print the clean version for students.

🖨️ Types of Chemical ReactionsPrint
Name: ________________________
Date: ____________

Part A · Write the word that matches each meaning

Word bank: chemical reaction, combustion, decomposition, double replacement, product, reactant, single replacement, synthesis
  1. a starting substance
  2. two compounds swap partners
  3. a substance formed
  4. combining into one product
  5. breaking into simpler substances
  6. one element replaces another
  7. a process forming new substances
  8. burning with oxygen

Part B · Show what you learned

  1. What happens in a synthesis reaction?
  2. What type of reaction is fuel + O₂ → CO₂ + H₂O?
  3. In a double-replacement reaction, what do the two compounds do?
Answer key — Part A: 1) reactant · 2) double replacement · 3) product · 4) synthesis · 5) decomposition · 6) single replacement · 7) chemical reaction · 8) combustion
Part B: 1) Two or more substances combine to form one product (A + B → AB). 2) Combustion. 3) They swap partners (AB + CD → AD + CB).