science chapter 1 section 1 and 3 chapter 2 section 3
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Chemistry | is the study of the properties of matter and how matter changes
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| matter | is anything that has mass and takes up space
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| substance | is a single kind of matter that is pure, meaning it always has a specific make up
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| physical properties | a characteristic of a pure substance that can be observed without changing it into another substance …..how matter looks,feels,smells,sounds and tastes
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| chemical properties | a characteristic of a pure substance that describes its ability to change into different substances….tells how matter can change into new kinds of matter…example: wood catching fire and burning
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| element | a pure substance that cannot be broken down into any other substance by chemical or physical means
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| atom | the basic particle from which all elements are made
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| Chemical bond | a force of attraction between two atoms
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| Molecule | groups of two or more atoms held together by chemical bonds
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| compound | a pure substance made of two or more elements chemically combined in a set ratio
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| chemical formula | shows the elements in compounds and the ratio of atoms
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| mixture | is made of two or more substances
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| Heterogeneous formula | you can see the different parts
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| Homogenous mixture | so evenly mixed that you can't see the different parts
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| solution | an example mixture of a homogenous mixture
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| physical change | is any change that alters the form or appearance of matter but does not make any substance in the matter into a different substance
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| chemical change | a change in matter that produces one or more new substances
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| law of conservation of mass | the fact that matter can not be made or destroyed
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| Energy | is the ability to do work or cause change
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| Temperature | is a measure of the average energy of random motion of particles of matter
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| thermal energy | is the total energy of all the particles in an object
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| endothermic change | change in which energy is taken in
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| exothermic change | releases energy
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| pressure | is the force of outward push divided by the area of the walls of the container
Pressure = force/area
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| Boyle's law | When the pressure of a gas at constant temputure is increased, the volume of the gas decreases. W.hen the pressure is decreased the volume increases
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| Charles's law | when the temperature of a gas increases at a constant pressure its volume increase. When the temputure of the gas is decreased at constant pressure, its volume decreases.
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Created by:
rsummers
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