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Essential Question: Type your answers here:

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Essential Question: Type your answers here:

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How does the burning of wood demonstrate energy transformation in chemical reactions? Is it Exothermic or Endothermic Reaction? Why?

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1. The student will be able to explain the difference between a physical change (no new substance) and a chemical change (new substance is formed).

2. The student will be able to identify real-life examples of exothermic processes (heat released) and endothermic processes (heat absorbed).

3. The student will be able to classify a change as physical or chemical and as exothermic or endothermic by using observations such as temperature change, color change, or new substance formation.

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Prompt students to summarize what they learned about physical and chemical changes, as well as exothermic and endothermic reactions. Encourage them to share any examples they observed or performed in class. Discuss as a class the key concepts of energy transfer and how changes in matter can release or absorb heat.

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Watch this quick 3 min. video and write one thing in your science notebooks you noticed in this lesson.

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Administer a quiz with 6 multiple-choice questions to assess students' understanding of today's lesson.

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Endo and Exothermic Reactions 7th Grade Quiz | Wayground (formerly Quizizz)

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Endo and Exothermic Reactions quiz for 7th grade students. Find other quizzes for Science and more on Wayground for free!

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Exothermic Reactions (Release Heat)

Heat energy comes out of the reaction.

The surroundings feel warmer.

Examples:

Burning a candle

Endothermic Reactions (Absorb Heat)

Heat energy goes into the reaction.

The surroundings feel cooler.

Examples:

Ice melting

💡 Tip for students:

Exo = Exit → heat leaves → warm

Endo = Enter → heat enters → cold

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CLASS 7. EXOTHERMIC  REACTION AND ENDOTHERMIC REACTION.

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Guided Practice : A quick Science Experiment

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Guided Practice : A quick Science Experiment

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Guided Practice: Observe heat Energy during rubbing your hands:

Materials:

Your hands

Procedure:

1. Observe: Rub your hands together quickly for about 30 seconds.

2. Feel: Notice how your hands feel after rubbing them together.

3. Think: Is it an endothermic or Exothermic reaction? Why?

Discussion:

What happened when you rubbed your hands together?

Why did your hands feel warmer?

What kind of energy was transformed into heat energy?

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OR TRY THIS: https://wordwall.net/resource/6635986/exothermic-and-endothermic-reactions

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Endothermic and Exothermic Reactions worksheet

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LiveWorksheets transforms your traditional printable worksheets into self-correcting interactive exercises that the students can do online and send to the teacher.

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5 min. Bell Ringer Activity & 5 min.Class Discussions

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5 min. Bell Ringer Activity & 5 min.Class Discussions

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Is ripping paper into small pieces a physical or a chemical change? Why? How can you tell if a change is physical or chemical? Give an example.