Topic: Matter Aim: Describe the different properties and changes of matter. Do Now: Take out your Food Web ISN. You have 4 minutes to work on the Material Cycles ISN. HW: CL Plant Review due tomorrow. CL Ecology Review due Monday.

1.Identify a carnivore from the food web. wolves, worms, fish 2. Describe the complete path of energy from the Sun to that carnivore. grass  deer  wolves grass  rabbits  wolves pond algae  rotifers  worms pond algae  rotifers  worms  fish

3. Why are decomposers necessary in this food web? Decomposers break down all dead organisms and return some nutrients back to the soil to be used again by plants.

4. Significant decrease in the wolf population occurs. After a period of one year, what change in the grass population would most likely be observed? A decrease in the wolf population would cause an increase in the rabbit and deer population. This would cause the grass population to decrease.

1.Identify the labeled parts of the plant in the diagram. 2.Identify the structure being described. a.Where photosynthesis occurs b.Absorbs water c.Transports water up to the leaves. d.Anchors plant 3. Identify the raw materials of photosynthesis. CO 2 and H 2 O 4. Identify a product of photosynthesis. C 6 H 12 O 6, O 2, H 2 O A B C Leaf Stem Roots A C B C

X Y Z Proton Neutron Electron

1. Identify an example of physical properties. Size Color Shape Odor Texture States of matter Density Melting points

Heat conductivity Electrical conductivity Hardness

Sulfur Yellow solid Melting point: C Boiling point: C. Mercury Silver, heavy, moveable liquid Melting point :38 C Boiling point: 356 C Very high density at 13.5 g/cm3 Nitrogen dioxide Brownish-red gas at room temperature Poisonous gas. Melting point: -9.3 C Boiling point: 21 C. Density: 3.3 g/l.

2. Identify an example of a chemical property. Flammability (ability to burn) Heat of combustion Reactivity with other chemicals Chemical stability

A glowing wooden splint placed in a test tube will continue to burn until the O 2 is used up.

3. Identify the type of change in which new substances are produced. Chemical change When the Statue of Liberty was erected in 1886, the copper metal was copper in color. By 1900, it had turned a turquoise color because the copper underwent a chemical change, going from metallic copper to a mixture of copper oxides, copper carbonates, copper sulfates, and copper chlorides due to exposure to various chemicals in the air and rain. Boiling an egg causes a chemical change because the heating of the egg causes the protein in the egg to change shape by breaking bonds and forming some new ones. When the egg cools down it doesn't look the same as it did before you heated it up..

Mixing vinegar and baking soda results in the mixture bubbles and fizzes. Water, carbon dioxide, and sodium acetate are produced. The chemical changes occurring when baking a bake results in sodium bicarbonate and tartaric acid in the baking powder reacting chemically to produce carbon dioxide gas so your cake will rise.

4. Identify an example of a physical change. Support your answer. Crushing a can (no new substances were produced) Melting an ice cube

An example of a physical change occurs when making a baseball bat. Wood is carefully crafted into a shape which will allow a batter to best apply force on the ball. Even though the wood has changed shape and therefore physical properties, the chemical nature of the wood has not been altered. The bat and the original piece of wood are still the same chemical substance.

Phase changes Tearing Crushing

When hydrogen peroxide (H 2 O 2 ) become water –Oxygen bubbles Iron rusting produced iron oxide (Fe 2 O 3 ) NEW SUBSTANCES ARE PRODUCED 5. Identify an example of a chemical change. Support your answer.

Ex: burning of wood cooking of an egg souring of milk

Chemical changes are changes substances undergo when they become new or different substances. For example, the fireworks we see on the 4th of July are actually metals such as magnesium and copper that change chemically as they light up the night skies with their fantastic colors.

Let’s summarize… 1.What are some of the physical changes of matter? 2.Explain what happens to a substances when a physical change occurs. 3.What are some of the chemical changes of matter? 4.Explain what happens to a substances when a chemical change occurs.

Physical or Chemical Property? CombustibilityCPDensityPP MalleabilityPPTendency to corrode CP WeightPPVolumePP Failure to react CPMelting pointPP DuctilityPPOdorPP TexturePPFlammabilityCP

Physical or Chemical Change? Digestion of food CCExplosionsCC Getting a haircut PPLighting a candleCC EvaporationPCTarnishing silverCP Ice cube melting PPFormation of acid rain CP Crushing rocksPPDissolving salt in water PP

Review hers/Dana/chemphys.html

An example of a chemical change is 1) evaporation 2) condensation 3) burning 4) freezing