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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


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


SI unit for density

oil is

less dense than water

steel has a

density that is less than water


the measurement used to describe a grain of rice

ice is

less dense than water


a prefix meanning 1/1,000

37 degrees celcius

the normal body temperature


depends on mass and volulme


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


effects an object's weight


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


the weight of a large apple


has low mass per unit volume


SI unit for matter

dissolving salt in water demonstates

solubility and a physical change

boiling and freezing points are

examples of physical properties


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


an amorphous solid formed when lightning strikes silica


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


occurs at same temperature as melting

irn has a

higher freezing point than water


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


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)


an element that conducts thermal energy well and is easily shaped

the particles in both a suspension and a colloid can

scatter light


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

nonmetals are


gold is....

not a compound


an element needed to make proteins in nature

air is a


brass is not a....


blood is a...


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.


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


based on mass of objects and distance between them


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


has unequal amount of protons and electrons


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


a group of highly reactive gases

alkaline-earth metals

have greater density than alkali metals


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


the elements in a period become...

less metallic from left to right


a row of elements on the periodic table


a column of elements on the periodic table


a very reactive metal


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


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


mainly composed of elements that are nonmetals

alkali metals

soft enough to be cut with a knife


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


are radioactive


part of period 6, metals, shiny and reactive


the element that's most reactive with potassium


the element thats most reactive with oxygen

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