Lesson Objective: You will be able to define a chemical change AND be able to list out evidence that a chemical change has occurred.

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Presentation transcript:

Lesson Objective: You will be able to define a chemical change AND be able to list out evidence that a chemical change has occurred.

Evidence: 1. Gas production. (Bubbles)

Evidence: 3. Formation of a precipitate. -Precipitate = a solid.

Some common examples of chemical changes include…

-Rusting: Water and oxygen interact with metal to form a new substance, rust!

During a chemical change a – A – new substance with new properties are formed. B – no new substance is formed. C – new substance with the same properties as before is formed. D – nothing happens.

Which of the following is NOT evidence that a chemical change has occurred? A – color change. B – gas production. C – temperature change. D – change in state of matter.

Which of the following is an example of a chemical change? A – Water is boiled and evaporates. B – Sugar dissolves in water. C - Two liquids are mixed, and a solid substance forms. D - A piece of paper is cut into many small pieces.

What evidence would indicate that a new substance is produced? A - The tablets dissolve in water. B – The water becomes murky. C – The water rises. D - Bubbles are given off.