Physical Science Test

Front 1

a type of matter with a fixed composition

Back 1

pure substance

Front 2

the basic unit of matter

Back 2

atom

Front 3

made up of one kind of atom

Back 3

element

Front 4

if all atoms have the identity, that substance is a?

Back 4

element

Front 5

there are about ? elements found on earth

Back 5

90

Front 6

all elements are on the?

Back 6

periodic table

Front 7

a fixed composition of elements

made up of 2 or more elements

Back 7

compound

Front 8

a material made up of two or more substances that can be easily separated by physical means

Back 8

mixture

Front 9

a mixture in which different materials can be distinguished easily is called a?

Back 9

heterogeneous mixture

Front 10

a ? contains 2 or more gaseous, liquid, or solid substances blended evenly throughout

Back 10

homogenous mixture

Front 11

another name for a homogeneous mixture like a cold soft drink is ?

Back 11

solution

Front 12

is a homogeneous mixture of particles so small that they cant be seen with a microscope and will never settle at the bottom of their container

Back 12

solution

Front 13

a type of mixture with particles that are larger than those in solutions but not heavy enough to settle out

Back 13

colloid

Front 14

this scattering of light by colloidal particles is called the ?

Back 14

Tyndall effect

Front 15

is a heterogeneous mixture containing a liquid in which visible particles settle

Back 15

suspension

Front 16

any characteristic of a material that you can observe without changing the identity of the substance that make up the material is a ?

Back 16

physical property

Front 17

examples of a physical property

Back 17

color, shape, size, density, melting point, and boiling point

Front 18

every substance has a specific combination of ?

Back 18

physical properties

Front 19

in a mixture, each substance retains its own ?

Back 19

physical properties

Front 20

one can seperate substances from a mixture by using their ?

Back 20

physical properties

Front 21

properties used to separate mixtures

Back 21

size, magnetism, solubility(dissolve)

Front 22

a change in size, shape. or state of matteris called a ?

Back 22

physical change

Front 23

a substance that can change

Back 23

iron

Front 24

one way to separate out mixtures of liquids using the boiling point is ?

Back 24

distillation

Front 25

a ? is a characteristic of a substance that includes whether it can undergo a certain chemical change

Back 25

chemical property

Front 26

any characteristic of a material that you can observe that produces a new substance

Back 26

chemical property

Front 27

example of a chemical property

Back 27

flammibility

Front 28

is the change of one substance into another

Back 28

chemical change

Front 29

clues that a chemical change has occurred

Back 29

1. production of a gas

2. production of a solid

3. energy changes

4. color changes or new odor

Front 30

the only sure proof that a chemical change has occurred

Back 30

that a new substance is produced

Front 31

is a chemical change

Back 31

tarnishing

Front 32

according to the ? the mass of all substances that are present before a chemical change equals the mass of all substances that remain after the change

Back 32

law of conservation of mass

Front 33

anything that takes up space and has mass

Back 33

matter

Front 34

3 states of matter

Back 34

liquid, gas, and solid

Front 35

average kinetic energy of the particles in the subtance.

Back 35

temperature

Front 36

states the volume of a gas increases with increasing temperature as long as the pressure of the gas doesn't change

Back 36

Charle's law

Front 37

states if you decrease the volume of a container of gas and hold the temperature, the pressure of the gas will increase

Back 37

Boyle's law