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Created with Fabric.js 1.4.5 1.1-Matter and Chemistry Questions 1. What is the difference between precision and accuracy?2. Are all chemicals dangerous?3. How do weight and mass differ?4. Give three examples of derived quantities.5. To three significant figures, what should .4685 grams be reported as?6. Is water freezing in a freezer overnight exothermic or endothermic?7. Are theories always true?8. Give an example of an unexpected scientific discovery.9. What is 23,890,000 in scientific notation?10. What is the SI prefix for 10^-9? Chemicals are often thought of as dangerous and bad, but really everything is made of chemicals.There are three main stages chemicals can be. Solid, when there is no room for the particles to move, Liquid, where there is limited room for the particles to move, and Gas, where the particles can move freely. Physical properties are visible to the eye or without changing the product, while chemical properties involve changing the substance for testing reasons. The difference between a law and theory is a law is a proved accusation while a theory is tested but not proved.Homogeneous mixture- an evenly mixed solution that is the same throughout. Two samples of this will be the same.Heterozygous mixture- an unevenly mixed solution that you can see a change in. Two samples of this will be different.Compounds are composed of more than one kind of atom while a mixture contains two or more pure substances.The scientific method is a process for drawing conclusions. The weight of an object depends on the gravitational pull, and the mass is the quantity of matter in an object. Filtration- used to separate solids from liquids. Evaporation- heat the substance until it vaporizes. Chromatography- a way to separate mixtures 1. Precision-closeness of results; accuracy-closeness to predicted value2. No3. Weight is the force gravity exerts on an object while mass is the amount of matter in an object4. Density, Area, volume5. .468 grams6. Exothermic7. No8. Teflon9. 2.389x10^710. Nano-
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