Chapter 1 Science
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| one example of changing a substance physically is... | blending a milkshake
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| one example of changing a substance chemically is | burning wood
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| characteristic property that can help similar liquids apart is | boiling point
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| why might you need to study at least two or three characteristics before you can accurately identify a substance | many substances share meting points, boiling points, or other characteristic properties
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| sugar and salt are examples of | pure substance
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| substances that CANNOT be broken chemically into other substances are | elements
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| the measurement of the force of gravity on an object is the object's | weight
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| the measurement of how much matter an object contains is its | mass
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| the density of a block of wood with a volume of 50 cubic cm and a mass of 100 grams is | 2 g/cm3
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| all elements are composed of extremely small particles called | atoms
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| the first person who came up with the idea of atoms was | Democritus
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| according to Dalton's theory of atoms, all atoms in the same element | are exactly alike
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| what did Dalton's theory of atoms say about compounds | atoms of two or more elements can combine to form compounds
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| a group of atoms that are joined together and act as a single unit is called a | molecule
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| what holds atom together in a molecule | chemical bonds
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| why can gold be separated easily from surrounding material | it has a high density
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| what technique did miners use to separate gold from sand and dirt | panning
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| copper can be separated from surrounding material because of its | chemical activity
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| in nature copper usually exists as a | compound mixed with other material
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| how would you calculate the density of an object | m/v
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| SI unit for mass is the | kilogram
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| pure substances formed from chemical combinations of two or more different elements are called | compounds
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| which type of matter consists of two or more substances that are not chemically combined | mixtures
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| how do liquid water, ice, and water vapor differ | they are different states of matter
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| which statement was not part of Dalton's theory of atoms? | all atoms are alike
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| Dalton's theory of atoms said that the masses of elements in a compound are always | in a constant ratio
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| electric current breaks the chemical bond that joins a metal and other elements in an ore in a process called | electrolysis
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| iron can be seperated from the oxygen in its ore by | by heating the ore in a hot, charcoal fire
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| statment part of Dalton's theory of atoms? | atoms of each element have a unique mass
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| a change that produces one or more new substances is called | chemical change
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| the ____ point of water is 100'C | boiling
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| a _____ substance is made of only one kind of matter and has definite properties | pure
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| an objects ___ is a measure of the force of gravity acting on the object. | weight
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| the density of a material is expressed as ____ | m/v
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| smallest particle of an element is called an ___ | atom
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| in the early 1800s, John Dalton proposed a theory including the idea that atoms ____ be broken apart | cannot
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| a ___ can contain just a few atoms or as many as a billion atoms | molecule
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| ____ is a Characteristic property that enables miners to distinguish between real gold and "fools gold", or pyrite | density
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| in blast furnaces, iron metal separates from its ore because oxygen in the ore reacts with ___ | carbon
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| the burning of wood is an example of ___ | chemical change
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| characteristic temperatures at which a pure solid changes to a liquid is its ____ | melting point
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| a ____ is formed when two or more or more substances mix together so well that they appear to be a single substance | solution
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| mass is the measure of the total amount of ____ in any object | matter
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| the units liter, milliliter, and cubic centimeters are all used to measure the ___ of an object or substance | volume
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| one of the first person known to develop the idea of atoms was the ancient Greek philosopher ____ | Democritus
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| John Dalton said that the masses of the _____ in a compound are always in a constant ratio | elements
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| A ____ is a group of atoms that are bonded together and act as a single unit | molecule
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| If you slowly pour out a mixture of metallic gold, dirt, and water, the gold will sink and remain behind because of its high ____ | density
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| Usually a ___ change is needed to release iron from the ore in which it is founf | chemical
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| Dissolving a spoonful of sugar in tea or coffee is an example of a ___ change | physical
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| boiling point and melting point are two ___ properties, which remains the same for any sample of a substance | characteristic
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| A ___ is a pure substance formed from two or more elements | compound
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| Two objects that have the same ___ will have the same weight when they experience the gravitational force of the same planet. | mass
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| The unit used to measure density is a unit of mass divided by a unit of ___ | volume
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| According to Dalton's theory about matter, the ____ of the same element are exactly alike | atoms
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| A _____ is a force that holds the atoms in a molecule together | chemical bond
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| the metallic element ____ has a high density that causes it to separate from other materials during the panning process. | gold
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| Metallic copper can be separated from its compounds by an electric current during the process called ___ | electrolysis
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| the smallest possible molecule is made of two ____ held together by a chemical bond | atoms
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| How do you find the increment on a graduate/thermometer/beaker | difference between two numbers divided by number of lines between numbers
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| When deciding where things belong in the beaker it goes from what to what | least dense to most dense
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| looks uniform | Homogeneous
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| you can see the individual parts | Heterogenous
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
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You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
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Created by:
16asantiago