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39 Cards in this Set
- Front
- Back
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Science that deals with composition, structure and properties of matter
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Chemistry
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The process by which one or more substances change to produce one or more different substances
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Chemical reaction
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Substance that has fixed volume and shape that result from the way their particles are arranged
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solid
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Substance that has fixed volume but not a fixed shape
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Liquid
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substance that has neither fixed volume nor fixed shape
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Gas
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Changes in which the identity of a substance doesn't change
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Physical change
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Changes in which the identities of substances change and new substances form
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Chemical change
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Describe the motion of particles in a solid
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particles are held tightly in a rigid structure with only slight vibrations
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Describe the motion of particles in a liquid
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Particles can flow past each other and take the shape of container. Not held together as strongly as a solid
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Describe the motion of particles in a gas
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particles are weakly attracted to one another and move independently at high speed. Fill container completely
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Melting ice: chemical or physical change?
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physical change
all changes of state are physical |
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Toasting bread: chemical or physical change?
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chemical change
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Cracking an egg: chemical or physical change?
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Physical change
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What is the formula for density?
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mass/volume
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How are reactants and products shown in a chemical equation?
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reactantsproducts
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Anything that has mass and takes up space
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matter
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a measure of the size of a body or region in three dimensional space
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volume
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the quantity of matter contained in an object
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mass
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the measure of the gravitational force exerted on an object
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weight
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A property of matter that can be determined without changing the nature of the substance. You can observe it with your senses
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Physical property
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A property of matter that describes a substance's ability to participate in chemical reactions
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Chemical property
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Mercury II oxide is bright red: physical or chemical property?
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Physical property
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Mercury combines readily with sulfur at normal room temperatures: physical or chemical property?
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chemical property
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Mercury is ductile and malleable: physical or chemical property?
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Physical property
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Why is density a physical property rather than a chemical property of matter?
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You can measure it without changing the substance
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The smallest unit of an element that maintains the properties of that element
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atom
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a sample of matter that has definite chemical and physical properties that can be used to identify it
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pure substance
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substance that cannot be separated or broken down into simpler substances by chemical means
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element
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two or more atoms combined in a definate ratio
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molecule
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substance made up of atoms of two or more different elements joined by chemical bonds
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compounds
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a combination of two or more substances that are not chemically combined
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mixture
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a solid mixture
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alloy
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mixture that has a uniform structure or composition throughout
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homogeneous
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mixture that has different regions with different properties
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heterogeneous
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homogeneous or heterogeneous: iced tea
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homogeneous: uniform composition, won't settle on standing
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Homogeneous or heterogeneous: blood
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heterogeneous: non-uniform, settles on standing
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homogeneous or heterogeneous: salad
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heterogeneous: non-uniform
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Type of observation that does not involve a number
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qualitative
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Type of observation that involves a number or measurement
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quantitative
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