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I only put the hardest questions in, obviously it's not all of them. It's a mixture from the 6 main study guides.

physical science

study of matter and energy

a hypothesis must be

testable and supported by evidence

a hypothesis is developed out of

experiments and observations

physical science is divided into

physics and chemistry

what doesn't involve physical science

social interactions between animals

biology

uses physical science to explain how the heart pumps blood, how our eyes and ears work ect.

if you can't use a controlled experiment you should....

build a model so you can control the factors

controlled experiment

involves a control group, experimental group, and a variable

to study the side effects of a medicine you should...

include a control group that doesn't get medicine

g/cm3

SI unit for density

oil is

less dense than water

steel has a

density that is less than water

millimeters

the measurement used to describe a grain of rice

ice is

less dense than water

milli-

a prefix meanning 1/1,000

37 degrees celcius

the normal body temperature

density...

depends on mass and volulme

inertia

increases as mass increases

volume of a liquid is measured...

at the lowest part of the meniscus

meters cubed

what the volume of a solid is expressed in

gravity

effects an object's weight

newton

the SI unit of force

weight is...

dependent on where the object is in relation to earth, also depends on the mass of the object and the mass of earth

density is the same at

a given pressure and temperature

a favorable chemical property of irn is..

nonreactivity with oil and gasoline

to distinguish between wax and plastic you could

burn them separately

chemical changes

can be undone by other chemical changes

newton

the weight of a large apple

titanium

has low mass per unit volume

kilogram

SI unit for matter

dissolving salt in water demonstates

solubility and a physical change

boiling and freezing points are

examples of physical properties

condensation

a change of state where atoms become more ordered

the volume of gas in a piston decreases when

the temperature doesn't change but the pressure is reduced

the particles of water that evaporate from an pen container have...

more speed and higher energy than the particles that remain

fulgurite

an amorphous solid formed when lightning strikes silica

plasma

a form of matter where the particles are broken apart

if a pressure cooker contains steam at high pressure then..

the particles of gas are close together and collide with the inside of the container at a fast rate

Boyle's Law

states that for a fixed amount of gas at a constant temperature, the volume increases as the pressure increases

Charle's law

states that for a fixed amount of gas at a constant pressure, volume increases as temperature increases

freezing

occurs at same temperature as melting

irn has a

higher freezing point than water

boiling

vaporization that occurs throughout a liquid

atmospheric pressure is...

lower at the top of the mountain, lowering the boiling point of the water

condensation point

the same temperature as the boiling point at a given pressure and the temperature at which gas changes to a liquid

solid carbon dioxide

is most likely to undergo sublimation

steam condenses into liquid water

at 100 degrees celcius at sea level

amorphous solid

has particles that are not in an orderly arrangement

to boil water at a temperature lower than 100 celcius you must....

decrease the pressure

fog forms when

the air temperature drops

vaporization

a change of state used to cool football players down

to increase the solubility of gas in a liquid you should...

decrease the temperature

a substance that can only be separated by chemical means is

water (electrolosis)

metal

an element that conducts thermal energy well and is easily shaped

the particles in both a suspension and a colloid can

scatter light

distillation

a process that can be used to separate crude oil from its components

nonmetals are

unmallable

gold is....

not a compound

nitrogen

an element needed to make proteins in nature

air is a

mixture

brass is not a....

suspension

blood is a...

suspension

a suspension is a

heterogeneous mixture

the elements gold, copper, sulfur, neon, and carbon

do not react readily with water or air and can be found uncombined in nature.

metalloids

can become good conductors when mixed with other elements

a colloid

can be made from solids, liquids, and gases

a suspension can be...

a medicine that instructs you to shake the bottle well before using

steel is a....

mixture, alloy, and solution

examples of metalloids are...

silicon, boron, and antimony

examples of colloids are...

fog, milk, and mayonnaise

gravity

based on mass of objects and distance between them

electron

the least massive particle of an atom

the size of atoms...

varies widely

mass number

the sum of protons and neutrons

atomic number

the number of protons

atomic mass

a weighted average of all the naturally occurring isotopes

ion

has unequal amount of protons and electrons

isotope

has unequal amounts of protons and neutrons

electromagnetic force

holds the electrons around the nucleus, causes protons in the nucleus to push away from each other

halogens

a group of highly reactive gases

alkaline-earth metals

have greater density than alkali metals

silicon

a metalloid

most metals...

are made up of atoms with few electrons in their outer energy level

the elements in groups 3-12

are solids at room temperature, except for mercury

Mosely determined the number of _ in an atom

protons

the elements in a period become...

less metallic from left to right

period

a row of elements on the periodic table

group

a column of elements on the periodic table

lithium

a very reactive metal

nonmetals

have an almost complete set of electrons in their outer energy level

metalloids

have a half-complete set of electrons in their outer energy level

air

mainly composed of elements that are nonmetals

alkali metals

soft enough to be cut with a knife

Hydrogen

has physical properties more like the properties of nonmetals than of metals; the most abundant element in the universe

actinides

are radioactive

lanthanides

part of period 6, metals, shiny and reactive

bromine

the element that's most reactive with potassium

sodium

the element thats most reactive with oxygen

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