Chapter 1, Introduction to matter

Question 1

Matter

Answer 1

anything that has mass and takes up space

Question 2

Chemistry

Answer 2

the study of matter and how matter changes

Question 3

substance

Answer 3

is a single kind of matter that is pure,meaning it always has a specific makeup or composition

Question 4

Physical property

Answer 4

is a characteristic of a substance that can change, but the changes do not produce a different substance

Question 5

Chemical property

Answer 5

is a characteristic of a substance that describes the ability to change into a different substance

Question 6

weight

Answer 6

the measure of the force of gravity on you

Question 7

mass

Answer 7

the amount of matter in an object

Question 8

International System of Units

Answer 8

metric system

Question 9

volume

Answer 9

the amount of space that matter occupies

Question 10

density

Answer 10

a measure of how much mass of a substance is contained in a given volume

Question 11

element

Answer 11

is a substance that can not be broken down into other substances by chemical or physical means

Question 12

atom

Answer 12

is the basic particle from which all elements are made

Question 13

chemical bond

Answer 13

when two atoms combine

Question 14

molecule

Answer 14

a group of two or more atoms held together by chemical bonds

Question 15

compound

Answer 15

is a substance made of two or more elements that are chemically combined in a set ratio

Question 16

chemical formula

Answer 16

symbols to show the elements in the compound and the ratio of atoms

Question 17

mixture

Answer 17

is made of two or more substances that are together in the same place, but their atoms are not chemically bonded

Question 18

heterogeneous mixture

Answer 18

you can see two different parts and they can be easily seperated out

Question 19

homogeneous mixture

Answer 19

the substances involved are so evenly mixed that you can’t see the different parts

Question 20

physical change

Answer 20

alters the form or appearance of matter but does not turn substance in the matter into a different substance

Question 21

chemical change

Answer 21

a change in the matter that produces one or more new substanes

Question 22

law of conservation of mass

Answer 22

the fact that matter is not created or destroyed in any chemical or physical change

Question 23

Temperature

Answer 23

a measure of how hot or cold something is

Question 24

Thermal energy

Answer 24

is the total energy of the motion of all of the particles in an object

Question 25

endothermic chance

Answer 25

a change in which energy is absorbed

Question 26

exothermic change

Answer 26

a change in which energy is relased

Question 27

chemical energy

Answer 27

the energy stored in the chemical bonds between atoms