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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.
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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
Solid 1. Has a definite shape 2. Has a definite volume Phases of Matter
Solid 3. Particles are tightly packed (can’t move or flow well) 4. Low energy Phases of Matter
Solid 5. May be crystals with repeating patterns Ex: salt Phases of Matter
Solid 6. Amorphous solids lose shape/flow like slow moving liquids Ex: candle wax, window glass, tar Phases of Matter
Liquid 1. No definite shape- takes the shape of the container 2. Has a definite volume Phases of Matter
Solid 3. Particles are packed loosely and flow slowly 4. Average energy Phases of Matter
Liquid 5. Varying viscosities= resistance of a liquid to flow Honey has a high viscosity Phases of Matter
Gas 1. No definite shape- takes shape of container 2. No definite volume Phases of Matter
Gas 3. Particles are spread far apart- fill all spaces 4. Contantly moving and bumping into eachother 5. High energy Phases of Matter
Gas 6. Particles can be squeezed in closer Bumping into eachother and walls causes pressure Phases of Matter
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
Melting Solid to liquid Must take in heat energy M.P of water = 0 C or 32 F Phase Changes
Freezing Liquid to solid Must lose heat energy F.P of water = 0 C or 32 F Phase Changes
Evaporation Liquid to gas Must gain heat energy B.P of water = 100 C or 212 F Phase Changes
Condensation Gas to liquid Must lose heat energy Phase Changes
Sublimation Solid skips to gas Must gain a lot of heat energy Ex: Freezer Frost Dry Ice Cirrus Clouds Phase Changes
Phase Change Website • Click here to view a phase change
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 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 Physical and Chemical Changes
