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31 Cards in this Set
- Front
- Back
John Dalton, in the early 1800's proposed the ideas of that atoms are rigid spheres that (can or cannot) be broken down
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cannot
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What is anything that has mass and takes up space?
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matter
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What is the formula to find density of an object?
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mass divided by volume
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If a block of wood has a volume of 50 cubic centimeters and a mass of 100 grams its density is
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2g/cm3
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You would have the same ______ on the moon and on earth
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mass
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What is it about gold that makes it easy to separate it from other materials in a mixture?
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high density
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From these words burning, baking, rusting or mixing which one indicates a physical change?
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mixing
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what is in the iron ore that reacts with carbon, in a blast furnace, to separate the iron metal?
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oxygen
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Who was the first person propose an atomic theory?
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John Dalton
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What physical properties enable miners to distinguish between real gold or fools gold or pyrite?
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the density
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Is it true that each substance can be identified by its properties?
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yes
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What is the SI units for mass?
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kilogram
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How does copper usually exist in nature?
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in a compound
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What are elements composed of?
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atoms
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From these words: cutting, burning, boiling, and crushing, which is an example of a chemical change?
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burning
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Did Dalton's theory of atoms include that all atoms of a molecule are alike?
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yes
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What is the measurement of how matter an object contains?
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mass
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What substances cannot be broken chemically into other substances?
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elements
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What kind of energy is transformed into thermal energy in a toaster?
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electrical energy
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What kind of change produces one or more resources?
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chemical change
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What can contain as few as as a two atoms or as many as million atoms?
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molecule
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What is the smallest particle of a element?
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atom
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Is this statement true? Water is made from only one kind of atom.
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no
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Atoms are held together by what?
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chemical bond
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How can iron be obtained from a compound of iron and oxygen?
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heating the compound
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What is the smallest particle of a element called?
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atom
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How are elements combined in a compound?
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in a set ratio
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Why does a piece of gold sink in the water? (hint:which is more dense?)
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gold is more dense
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When we study chemistry, it is the study of the changes matter undergo and the ____________ of matter.
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properties
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What kind of energy is related to the motion or position of matter?
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mechanical energy
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Does an object at rest on the floor involve energy causing change?
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no
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