what is WHMIS?
workplace hazard materials information system
what is the order of the metric conversion
what is matter?
anything that has mass and takes up space
what is the particle theory?
-all matter is made up of extremely small particles
-each pure substance has different from the particles of other pure substances
-particles attract each other
-particles are always moving
particles at higher temps move faster
what is density?
ratio of mass per unit volume
what is the desnsity mass volume traingle
M on top
d and v on the bottem
what is a pure substance?
a substance made up of the same type of particles
what is a element?
made up of the same type of atom
what is a compound?
made of 2 or more atoms of different elements that are bonded together
what is a mixture?
2 or more elements or compounds that are not bonded together
what is homogeneous matter
2 or more different substance mixed so you can not tell them apart
what is heterogeneous matter
2 or more different substances and you can tell them together
what are valence electrons
are the electrons in the last outer energy obrital
what is the charge and where is a proton located
has positive charge and is located in the nucleuse
what is the charge and where is a neutron located
is has a nutral charge and is located in the nucleuse
what is the charge and where is a electron located
it has a negative charge and it is located it the atoms orbitals
what are periods
rows that go left to right. they share the same number of electron orbitals
what are groups
colums that go up and down. they have the same number of valence electrons
what side are the metals and the non-metals on.
the metals are on the left and the non-metals are on the right
what are the three distinct types of elements
how do you find the reactivity of a element
the further you go down the table the more reactive the element.
how do you measure the atomic radius
the more you go to the right the atomic radius increases.
what are ions
do metals or non-metals gain or lose electrons
what are isotopes
changing the atomic mas
what happens when neutrons are gained or loss
the charge does not change but the atomic mass changes
what is a cell
basic unit of life
what are tissues
collection of cells of same type working to perform a function
what are organ systems
collection of organ and tissues working together to perform a function
what are individuals
a self contained organism composed of several organ systems
what is a population
group of individuals of the same speices
what is a community
group of different population
what is a ecosystem
a community with biotic and abiotic interactions
what is a biome
several ecosystems similar characteristics
what is a biosphere
all livable biomes
what are the three different ways a pyramid can be arranged
- # of organisms
what pyramid will always have a traditional pyramid shape
what is the formula for population growth?
birthrate+immigraction - death rate+emmigration
what is the key to electricity?
when a substance gains electrons what charge does it have
when a substance losses electrons what charge does it have
If a substance is higher in the electrostatic series than the other substance is it positive or negative
what are insulators?
substances in which electrons cannot move to atom to atom. when it becomes charged it stays charged until it is removed
what is a conductor
substances in which electrons can move from atom to atom freely. this allows the charge to travel through and out the conductors
what is charging by friction
two neutral objects are rubbed together repeatedly. electrons transfered so that one object gains electrons one object losses electrons.
what is charging by contact
one charged object makes contract with a neutral object. electrons are transferred resulting in the charged object each having the same charge.
what is induced charge separation
a neutral object can become temporarily charged when a charged object causes electrons to shift towards or away from the charge. when the charged object is removed the electrons shift back.