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Let’s Get Physical Don’t Be Dense Water Water Everywhere Chemical Romance Feelin’ the Heat…..or Not

Topic 1 Question for 5 Points What is a physical change? Show Answer

Topic 1 Answer for 5 Points Physical change – a change that affects one or more physical properties of a substance but does not change what the substance is made up of. Back to Board

Topic 1 Question for 10 Points List the common physical properties (there are 9) Show Answer

Topic 1 Answer for 10 Points melting point, boiling point, density, solubility, thermal conductivity, electrical conductivity, malleability, luster, magnetic attraction Back to Board

Topic 1 Question for 15 Points Give 3 examples of a physical property I demonstrated in class. Choose 1 and explain why it is a physical property. Show Answer

Topic 1 Answer for 15 Points Bending aluminum foil, shiny metal, melting lard. Malleability is a physical property because you can bend and shape a metal (such as aluminum foil) It doesn’t change what it is made up of. Back to Board

Show Answer Topic 1 Question for 20 Points Think of an object with one of the 9 physical properties. Identify which physical property you chose and explain a physical change that object can go through.

Topic 1 Answer for 20 Points Melting point You can melt a solid stick of butter into a liquid. It is still butter, it has only changed the state of matter. Back to Board

Topic 1 Question for 25 Points Give an example of an intrinsic property and explain why the amount or the form of the substances does not matter Show Answer

Topic 1 Answer for 25 Points Density and melting point are intrinsic properties because they do not depend on the amount of the substance or the form the substance is in. The melting point and density will be the same if it is a silver bracelet, silver ring, or silver coin. Back to Board

Topic 2 Question for 5 Points Define density Show Answer

Topic 2 Answer for 5 Points The amount of mass in a given volume. Back to Board

Topic 2 Question for 10 Points The mass of an object = 10 grams. The volume of an object = 2 ml. What is the density? Show Answer

Topic 2 Answer for 10 Points Density = 5 g/ml Back to Board

Topic 2 Question for 15 Points How would you measure the density of a wooden block? Show Answer

Topic 2 Answer for 15 Points Take the mass of the block using a balance Measure the length, width, and height to get the volume. Mass/volume = density Back to Board

Topic 2 Question for 20 Points How would you measure the density of an irregular object such as a small, oddly shaped rock? Show Answer

Topic 2 Answer for 20 Points 1.Add water to a graduated cylinder. 2.Record the volume. 3.Slide in the rock, record the new volume (take the difference for the volume of the rock. 4.Weigh the rock on a balance to get the mass. Mass/volume = density Back to Board

Topic 2 Question for 25 Points If given 5 liquids, (honey, water, oil, corn syrup, and dish soap), design an experiment to test the density of the liquids. Show Answer

Topic 2 Answer for 25 Points Back to Board 1.Density column 2.Mass and volume of liquids to get exact density

Topic 3 Question for 5 Points True or False? Water is the substance that exists naturally in the 3 states of matter (solid, liquid, gas) Show Answer

Topic 3 Answer for 5 Points TRUE Back to Board

Show Answer Topic 3 Question for 10 Points Give 2 examples of a property of water (we did 6 different ones in stations)

Topic 3 Answer for 10 Points Expands when freezes Adhesion Cohesion Surface tension High specific heat Solvent Back to Board

Show Answer Topic 3 Question for 15 Points Ice is less dense than water, therefore it floats. What physical property of water allows this to happen?

Topic 3 Answer for 15 Points Water expands when it freezes making the volume larger in solid form than liquid form. Ice is 9% less dense than water. Back to Board

Show Answer Topic 3 Question for 20 Points What is the difference between cohesion and adhesion?

Topic 3 Answer for 20 Points Cohesion water is attracted to other water molecules Adhesion water is attracted to other materials Back to Board

Topic 3 Question for 25 Choose 1 of the 6 properties of water and explain why it is essential to life on Earth? Show Answer

Topic 3 Question for 25 Points Solvent – water dissolves many substances and allows our cells to use valuable nutrients, minerals, and chemicals in biological processes. Surface tension plays a part in our body's ability to transport these materials all through ourselves. Back to Board

Topic 4 Question for 5 Points What is a chemical change? Show Answer

Topic 4 Answer for 5 Points Chemical change - causes a substance to change into an entirely new substance Back to Board

Topic 4 Question for 10 Points List the common chemical properties (there are 3) Show Answer

Topic 4 Answer for 10 Points Flammability, reactivity, rusting/corrosion/ oxidation Back to Board

Topic 4 Question for 15 Points Give 3 examples of a chemical property I demonstrated in class. Choose 1 and explain why it is a chemical property. Show Answer

Topic 4 Answer for 15 Points Burning a marshmallow, rusted scissors, Alka-Seltzer in water Burning a marshmallow – it has turned into a new substance Back to Board

Topic 4 Question for 20 Points Think of an object with one of the 3 chemical properties. Identify which chemical property you chose and explain a chemical change that object can go through. Show Answer

Topic 4 Answer for 20 Points Reactivity – baking soda and vinegar react and produce a gas. They have changed into new substances Back to Board

Topic 4 Question for 25 Points Show Answer List the 6 pieces of evidence that show a chemical change has happened. How does temperature affect chemical changes?

Back to Board 1.Gas 2.Odor 3.Heat 4.Production of a solid 5.Light or sound 6.Change in color Higher temperatures speed up reactions, colder temperatures slow down reactions

Topic 5 Question for 5 Points What does the suffix -thermic mean? Show Answer

Topic 5 Answer for 5 Points heat Back to Board

Show Answer Topic 5 Question for 10 Points What do the prefixes endo- and exo – mean?

Topic 5 Answer for 10 Points Endo – “into” or “absorb” Exo – “out of” or “release” Back to Board

Topic 5 Question for 15 Points Show Answer What is the difference between an endothermic reaction and exothermic reaction?

Topic 5 Answer for 15 Points Endothermic – a reaction that absorbs heat causing the surrounding area to feel cool/cold. Exothermic – a reaction that releases heat causing the surrounding area to feel warm/hot. Back to Board

Topic 5 Question for 20 Points Why does your hand feel cold when holding an ice cube? How is this similar to an endothermic reaction? Show Answer

Topic 5 Answer for 20 Points The heat from your hand is transferred to the ice cube. You feel cold because heat is leaving your hand. In endothermic reactions, heat leaves the surrounding area and goes into the reaction making the surroundings feel cold. Back to Board

Topic 5 Question for 25 Points If given 2 reactions, give 2 ways you could determine which reaction was endothermic and 2 ways to determine which reaction was exothermic. Show Answer

Topic 5 Answer for 25 Points 1. temperature increases, heat is released 2.feels warm to the touch(exothermic) 1. temperature decreases, heat is absorbed 2.feels cold to the touch(endothermic). Back to Board

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“Big Points” Question Explain how photosynthesis are related (but opposite) reactions. Use the formulas, what each needs & produces, and how they are dependent on each other. Show Answer

Big Points Back to Board