Study Jams: Chemical & Physical Changes

Changes of Matter: StudyJams! Science Click on the link to watch the Study Jams video on chemical and physical changes. Use the video to answer the questions. Which type of change can usually be reversed? a physical change a chemical change an electrical change a molecular change When does a physical change occur? when molecules combine to form a compound when a new element is created when the size, shape, or state of matter changes when elements combine to form a molecule If a substance changes color, what has most likely happened? A pressurized change has taken place. A chemical change has taken place. A physical change has taken place. Nothing has taken place. Which of the following would cause the molecules in matter to change? pressure motion extreme heat a moderate climate Stepping on a bag of potato chips would cause which type of change? mechanical thermal physical chemical Which of the following is a clue that a chemical change has taken place? A gas forms when the change takes place. The substance is smaller than it was before the change took place. The substance has been shaken up. The substance looks the same as it did before the change took place. What is the difference between a physical change and a chemical change? A physical change can only occur in liquids, and a chemical change can occur in a solid, a liquid, or a gas. A physical change is when the size, shape, or state of matter changes, and a chemical change is when the molecules of matter change to form a new substance. A physical change is when the molecules of matter change to form a new substance, and a chemical change is when the size, shape, or state of matter changes. A physical change can occur in a solid, a liquid, or a gas, and a chemical change can only occur in a liquid. Why is crushing graham crackers a physical change? Crushing the crackers changes the molecular structure of the crackers. Crushing the crackers does not change the crackers, it just makes them smaller. Crushing the crackers is not a physical change, it is a chemical change. Crushing the crackers changes the state of the crackers from solid to liquid. CHEMICAL CHANGE burning a marshmallow over the fire PHYSICAL CHANGE Smushing the marshmallow between 2 crackers