SCIENCE EXAM REVIEW

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Key concepts of matter

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Robert Crumpler

United States

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SCIENCE EXAM REVIEW


Compléter SCIENCE EXAM REVIEWVersion en ligne Key concepts of matter par Robert Crumpler 1 Thermal energy naturally flows from warmer to cooler matter , this is what we know as or flow . 2 Matter has and ( takes up space ) . 3 Chemistry is the study of and the changes in . 4 A balloon filled with air does not rise as high as a balloon filled with helium gas , telling me that helium gas is less than air . 5 A of iron and sulfur can be by magnets . 6 A special form of homogeneous mixture that is composed of evenly distributed solute particles in a solvent is called a ( n ) . 7 A is a single kind of matter that has a specific makeup or composition . 8 A ( n ) is the smallest part of a substance . 9 A ( n ) is the smallest unit of matter that has the properties of its element . 10 An object that floats on water has a less than 1 - g / mL . 11 An object that sinks in water has a density than 1 - g / mL . 12 An object ? s weight is 1 / 6 on the moon as it is on earth . On the moon , the object ? s is less . 13 Another term for the ability to burn is at temperatures below 37 . 8 °C . 14 Both a pool of water and a piece of ice are the same substance , so they have the same . 15 Butter melting in a pan is a physical change where energy is . 16 Characteristics of matter are called . 17 Compounds are formed as a result of bonding during chemical reactions in a set . 18 Four measurable physical properties of matter are weight , volume , mass , and . Of these , density and volume are derived measurements and must be calculated . 19 Glass breaking , ice melting , and the dissolution of sugar in water are all physical . 20 The of an object is a measure of the thermal energy ( motion of the particles ) of a substance . 21 The ability of iron to rust is a ( n ) property . 22 The amount of matter in an object is a measure of its . 23 The amount of space an object takes up is a measure of its . 24 The chemical symbol for is W , where Au stands for gold . 25 The chemical formula for water is and for hydrogen peroxide is . 26 The temperature at which a liquid turns to a gas is its point . 27 The process that makes ice cubes shrink as they sit in a freezer is called . 28 The process where bromine gas touches a surface and becomes crystals is called . 29 Particles of a gas have the greatest thermal . 30 Glass is an example of a ( n ) solid . 31 Sublimation and evaporation both happen at the of a substance . 32 is the reverse process of condensation . 33 The temperature at which a liquid turns to a solid is called its point . 34 is the reverse process of freezing . 35 Water particles in gas coming off a pan of water are moving faster than the particles of water in the pan . 36 As a result of Rutherford ? s gold foil experiment scientists inferred that an atom ? s positive charge must be concentrated in the of the atom . 37 Mendeleev created the first periodic table by arranging elements in order of increasing . 38 The of an element is the number of protons in its nucleus . 39 You can predict an element ? s properties based on its on the periodic table . 40 Metals are , , and can carry an . 41 The two most common alkaline earth metals are and . 42 At room temperature , more than half of the nonmetal elements are . 43 The elements that do not react to form compounds under normal conditions are the . 44 Beta radiation consists of particles that are identical to . 45 Measurements of make radioactive isotopes useful for determining the of fossils and rocks . 46 The elements in the same column ( or or ) on the periodic table have similar characteristic . 47 The most reactive metals on the periodic table are found in , period 1 - 7 which are the . 48 Mendeleev discovered that periodic patterns appeared when he arranged the elements in order of increasing . 49 The property of an element that indicates the number of protons in its atoms is the of that element . 50 The chemical of metals tends to decrease from left to right across the periodic table . 51 When electrons are shared between two atoms , a is formed . 52 A low melting point is one property of . 53 A is formed when two atoms share electrons equally . 54 The overall charge on an atom is zero ; the overall charge on a compound is zero ( making it ) - the criss cross cancels it out making it neutral . 55 When an atom loses an electron , it becomes a ( n ) positively charged . 56 A is when two pairs of electrons are shared between two atoms . 57 Aluminum foil is an example of a metal that is .

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SCIENCE EXAM REVIEW

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SCIENCE EXAM REVIEWVersion en ligne

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