Is it a CHEMICAL change or a PHYSICAL change? 1.Snowflakes melt in your hand. 2. You bake a cake. 3. A cup of milk turns sour when not refrigerated. 4. Water evaporates from a puddle. 5. A tree is put through a wood chipper. Warm-up: 8/25/14-Answer with a complete sentence.

The answers are… 1.Snowflakes melt in your hand. 2. You bake a cake. 3. A cup of milk turns sour when not refrigerated. 4. Water evaporates from a puddle. 5. A tree is put through a wood chipper.

 Changing the size and shapes of pieces of wood would be a chemical change.  In a physical change, the makeup of matter is changed.  Evaporation occurs when liquid water changes into a gas.  Evaporation is a physical change.  Burning wood is a physical change. Warm-up: 8/26/14-Copy the statement and write T for true and F for false.

 Changing the size and shapes of pieces of wood would be a chemical change. False  In a physical change, the makeup of matter is changed. False  Evaporation occurs when liquid water changes into a gas. True  Evaporation is a physical change. True  Burning wood is a physical change. False Answers

TRUE OR FALSE? 1.Cutting paper is a chemical change. 2. Folding a sheet of paper is a physical change. 3. A melting ice cube is an example of a physical change. 4. A campfire is an example of a physical change. 5. Painting a wall is an example of a chemical change. 6. Roasting a marshmallow is an example of a physical change. Warm-up: 8/27/14-Copy the statement and write T for true and F for false.

TRUE OR FALSE? 1.Cutting paper is a chemical change. 2. Folding a sheet of paper is a physical change. 3. A melting ice cube is an example of a physical change. 4. A campfire is an example of a physical change. 5. Painting a wall is an example of a chemical change. 6. Roasting a marshmallow is an example of a physical change.

Which phase change is taking place? 1.You are heating water on the stove and you see steam. 2. You see a smoky substance coming off of dry ice. 3. You notice your iced tea glass is wet on the outside. 4. You leave a case of water in the car, but the temperature dropped below zero that night. 5. You forget the ice cream in the trunk, and it’s 90 degrees out Warm-up: 8/28/14-Copy the statement and write the phase change it respresents.

The answers are… 1.You are heating water on the stove and you see steam. 2. You see a smoky substance coming off of dry ice. 3. You notice your iced tea glass is wet on the outside. 4. You leave a case of water in the car, but the temperature dropped below zero that night. 5. You forget the ice cream in the trunk, and it’s 90 degrees out

Challenge 3