Presentation on theme: "Phases, Phase Changes, Chemical and Physical Changes Science Fifth Grade Mr. Pate."— Presentation transcript:
Phases, Phase Changes, Chemical and Physical Changes Science Fifth Grade Mr. Pate
Standards S5P2. Students will explain the difference between a physical change and a chemical change. a. Investigate physical changes by separating mixtures and manipulating (cutting, tearing, folding) paper to demonstrate examples of physical change. b. Recognize that the changes in state of water (water vapor/steam, liquid, ice) are due to temperature differences and are examples of physical change.
Standards c. Investigate the properties of a substance before, during, and after a chemical reaction to find evidence of change. S5P1. Students will verify that an object is the sum of its parts
Standards a. Demonstrate that the mass of an object is equal to the sum of its parts by manipulating and measuring different objects made of various parts. b. Investigate how common items have parts that are too small to be seen without magnification
Essential Questions What is a chemical change? What is a physical change? How does an object equal the sum of its parts?
Task The students will use the liquid mixture in the baggie to create a change in state. The students will use a banana and break it into parts to see if the sum of the parts equal the whole.
Circumstance The students will work in teacher assigned groups to perform the experiments. They will use the lab sheets to record data and answer questions.
GOAL To discuss the states of matter and the terms relative to changes in state To distinguish between chemical and physical changes
Phases of Matter Solid1. Has a definite shape 2. Has a definite volume
Phases of Matter Solid3. Particles are tightly packed (can’t move or flow well) 4. Low energy
Phases of Matter Solid5. May be crystals with repeating patterns –Ex: salt
Phases of Matter Solid6. Amorphous solids lose shape/flow like slow moving liquids –Ex: candle wax, window glass, tar
Phases of Matter Liquid1. No definite shape- takes the shape of the container 2. Has a definite volume
Phases of Matter Solid3. Particles are packed loosely and flow slowly 4. Average energy
Phases of Matter Liquid5. Varying viscosities= resistance of a liquid to flow –Honey has a high viscosity
Phases of Matter Gas1. No definite shape- takes shape of container 2. No definite volume
Phases of Matter Gas3. Particles are spread far apart- fill all spaces 4. Contantly moving and bumping into eachother 5. High energy
Phases of Matter Gas6. Particles can be squeezed in closer –Bumping into eachother and walls causes pressure
Phase Website Phases of matter at the molecular level
Phase Summary Chart Work with a partner to fill in the phase summary chart
Phase Changes Matter such as water can change from phase to phase by adding or taking away heat energy
Phase Changes MeltingSolid to liquid Must take in heat energy M.P of water = 0 C or 32 F
Examples of Melting
Phase Changes FreezingLiquid to solid Must lose heat energy F.P of water = 0 C or 32 F
Examples of Freezing
Phase Changes EvaporationLiquid to gas Must gain heat energy B.P of water = 100 C or 212 F
Examples of Evaporation
Phase Changes CondensationGas to liquid Must lose heat energy
Examples of Condensation
Phase Changes SublimationSolid skips to gas Must gain a lot of heat energy Ex: –Freezer Frost –Dry Ice –Cirrus Clouds
Phase Change Website Click here to view a phase change
Phase Change Diagram
Assessment Determine what phase change is the opposite of evaporation. Explain
Assessment What type of phase change is seen in this picture? Explain what occurs during this phase change
Physical and Chemical Changes Physical Change Change in the appearance of a substance without changing its identity The atoms remain unchanged
Physical and Chemical Changes Chemical Change A substance changes into a new and different substance The atoms are altered Often involves chemical rx
Ice Cream Baggie Procedure: 1. Get a 1 gallon bag from Mr. Pate 2.Put two cups of ice into the bag. 3.Put ½ cup of rock salt on the ice and mix. 4.Place the liquid mixture baggie inside the gallon bag and seal the gallon bag. 5.Begin to gently shake and roll the bag in your hands. Pass to another group member if your hands get too cold. 6.Make sure that you are mixing the baggie with the liquid thoroughly. 7.You will need to mix thoroughly for at least 15 minutes. Check the clock to make sure. 8.If you have questions, raise your hand and talk to Mr. Pate.
Banana Procedure: 1.Using the balance and the gram stackers, find the mass of the banana. To do this, find the mass of the paper plate (Measure 1). Next, place the banana on the plate and find a new measure (Measure 2). 2.Subtract measure 1 from measure 2 to find the mass of the banana. 3.Carefully peel the banana into its edible and inedible parts. 4.Place the edible part of the banana on the plate and find its mass(Measure 3). 5.Subtract Measure 1 from Measure 3 to find the mass of the edible part of the banana. 6.Place the inedible part of the banana on the plate and find the mass (Measure 4). 7.Subtract Measure 1 from Measure 4 to find the inedible mass.