Chapter 6 Study Guide

Question 1

anything that has mass and takes up space

Answer 1

matter

Question 2

the study of matter and how is changes

Answer 2

chemistry

Question 3

a characteristic of a substance that can be observed without changing the substance into another substance

Answer 3

physical property

Question 4

a characteristic of a substance that describes its ability to change into other substances

Answer 4

chemical property

Question 5

any change that alters the form or appearance of a substance but does not make the substance into another substance

Answer 5

physical change

Question 6

a change in matter that produces one or more new substances

Answer 6

chemical change

Question 7

the substances that undergo change in a chemical reaction

Answer 7

reactant

Question 8

the new substances formed by the reaction

Answer 8

product

Question 9

a solid that forms from solution during a chemical reaction

Answer 9

precipitate

Question 10

in this type of reaction, the total making and breaking of bonds results in a net absorption of energy

Answer 10

endothermic reaction

Question 11

in this type of reaction, the total making and breaking of bonds results in a net release of energy

Answer 11

exothermic reaction

Question 12

a short, easy way to show a chemical reaction, using symbols instead of words

Answer 12

chemical equation

Question 13

states that during a chemical reaction, matter is neither created nor destoryed

Answer 13

conservation of matter

Question 14

in this type of system, matter can enter from or escape to its surroundings

Answer 14

open system

Question 15

a system where matter isn’t allowed to enter or leave

Answer 15

closed system

Question 16

a number placed in front of a chemical formula in an equation

Answer 16

coefficient

Question 17

when two or more elements or compounds combine to make a more complex substance

Answer 17

synthesis

Question 18

occurs when compounds break down into simpler products

Answer 18

decomposition

Question 19

When one element replaces another in a compound, or when two elements in different compounds trade places

Answer 19

replacement

Question 20

the minimum amount of energy needed to start a chemical reaction

Answer 20

activation energy

Question 21

the amount of a substance in a given volume

Answer 21

concentration

Question 22

a material that increases the rate of a reaction by lowering the activation energy

Answer 22

catalyst

Question 23

biological catalysts

Answer 23

enzyme

Question 24

a material used to decrease the rate of a reaction

Answer 24

inhibitor

Question 25

a rapid reaction between oxygen and fuel

Answer 25

combustion

Question 26

a material that releases energy when it burns

Answer 26

fuel