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Science Exam 1 2012
subjects: atoms,elements,compounds,mixtures, atomic structure, pressure, liquid pressure,air pressure,moments, variation, DNA,inherited characteristics and gender,circuits, fitness, ions
69
Biochemistry
8th Grade
01/15/2012

Additional Biochemistry Flashcards

 


 

Cards

Term
elements
Definition
these are made up of only one type of atom ie. gold
Term
atoms
Definition
everything is made up of these
Term
compound 
Definition
atoms of different elements are joned together by chemical bonds to make these ie. water (H20)
Term
mixture
Definition
a substance made of different subsatnces not joined by chemical bonds
Term
mass number
Definition
protons + neutrons
Term
atomic number
Definition
number of proton in the nucleus
Term
which number shows how many crosses or dots to put on the drawing of an atom?
Definition
the proton number (if neutral)
Term
weight is measured in...
Definition
newtons
Term
the pressure calculation
Definition
force(n) ÷ area(m2)
Term
air ressure is caused by...
Definition
collision of air particles on a containers surface
Term
increased number of air particles=
Definition
more collisions which means a higher pressure
Term
liquids are...
Definition
non-compressible
Term
pressure acts...
Definition
equally in all directions
Term
moments make things...
Definition
turn or rotate
Term
moments are caused by...
Definition
forces
Term
moments occur...
Definition
 around a pivet
Term
variation is...
Definition
the differnces between individuals of the same species
Term
your body is made up of... 
Definition
cells
Term
the nucleus of cells contain...
Definition
chromosones
Term
chromosones hold...
Definition
DNA
Term
DNA is found in a ...
Definition
double helix
Term
proteins help build...
Definition
specialised cells
Term
DNA contains bases which together make up...
Definition
genes
Term
genes control...
Definition
different charateristics eg.eye colour
Term
the four acids found in DNA are...
Definition

Guanine

Cytosine

Thymine

Adenine

Term
which two acids always pair together?
Definition

A and T

G and C

Term
the sperm and egg are required in...
Definition
sexual reperodction
Term
gametes join together in...
Definition
sexual reprouduction
Term
fertilisation occurs in... 
Definition
sexual reproduction
Term
there is no joining of gametes in...
Definition
assexual reroduction
Term
only one parent is needed in...
Definition
assexual reproduction
Term
females have which chromosones?
Definition
xx
Term
males have which chromosones?
Definition
xy
Term
homozygous
Definition
same
Term
hetrozgous
Definition
different
Term
a wide base means an object will be...
Definition
stable
Term
low centre of mass..
Definition
objects more stable
Term
current
Definition
the flow of negatively charged electrons-  measured in amps
Term
circuit
Definition
complete path along which a current may flow
Term
series circui
Definition
current remains the same as there is only on path the electrons can take
Term
parralel circuit
Definition
the current splits 
Term
voltage
Definition
the energy transferred by the electrons from the cell to the componant
Term
resistance is measured in...
Definition
ohms
Term
resistance can be increased by...
Definition
adding componants
Term
more difficult for electrons to flow if...
Definition
the resistance is higher
Term
kinds of energy
Definition

kinetic

sound

gravity

heat

light

electrical

chemical

elastic

nucleur

magnetic

 

Term
oxygen debt
Definition
the amount of oxygen required during recovery from vigourous exersize
Term
health
Definition
state of natural, hysixal, mental an social well-being
Term
if your  healthy you are free from
Definition
disease
Term
healthy challenges
Definition
mental and physical
Term

fitness

 

 

Definition

flexibility

strength

speed

stamina

agility

Term
BMI
Definition
Body Mass Index
Term
BMI Calculation
Definition
weight(kg) ÷ height(m)2
Term
blood pressure calculation
Definition

systolic pressure ÷   

diastolc pressure

Term
carbohydrates
Definition

source of long term energy/

slow release energy

Term
fats
Definition
build up cell membranes to insulate our bodies
Term
proteins
Definition
growth, repair and replacement
Term
fibre
Definition
roughage, helps muscles in the intestine move the material along the peristalsis
Term
vitamins and minerals
Definition
essential for proccesses within the body
Term
ionic bonding
Definition
bonding between metal and non-metals atoms-transfer of electrons
Term
ionic melting and boiling points are...
Definition
high
Term
ionic bonding structures are/are not soluable in water
Definition
are soluable in water
Term
ionic bonding strctures condut electricity when...
Definition
molten or dissolved in water
Term
an ionic bond is...
Definition
the attraction of oppositely charged ions
Term
covalent bonding
Definition
occurs between non metals only and is the sharing of electrons
Term
an ion is...
Definition
an element with a different number of electrons to protons due to the gain or loss of electrons from a different element
Term
RDA of protein calculation
Definition
your weight x 0.8
Term
aerobic respiration equation
Definition

glucose + oxygen →

carbon dioxide + water

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