maths
what is the sine rule
Sin(A) / a=Sin(B) / b
or
a / Sin(A)=b / Sin(B)
what does question 1 ask you to do in paper 1?
list four things about (blank)
where are proteins produced in a cell
ribosomes
why is aluminium oxide combined with cryolite during electrolysis
calculate the energy needed to heat 500g of water from 21*C to 37*C (specific heat capacity of water=4200)
E=mass x specific heat capacity x change in temp
33600J
what is the cosine rule?
a^2=b^2+c^2-2bcxCos(A)
which two questions use the same technique in paper 1 and paper 2?
question 2 and 3
what is the shape of DNA
double helix
what colour do potassium and copper burn?
pink/lilac and green
list all types of radiation from most to least ionising
alpha>beta>gamma
a right angled triangle length AB=5 and BC=12
calculate AC
13cm
what does question 4 in paper 1 ask you to do?
do you agree that [blank] and [blank] happens and why
balanced symbol equation for photosynthesis
6CO2+6H20 = C6H12O6 +602
how can carbon electrodes be 'burned away'?
react with oxygen produced , produces carbon dioxide , electrode wears away
calculate power
I=7
R=5
343W
a right angled triangle length AB=5 and AC=12
calculate BC to 1DP
10.9cm
what can you write about in paper 1 section B?
anything that is 'suggested by' the image
state how to get a preferred characteristic from an animal (100pts per point)
choose animals with the preferred characteristic , breed them together , choose the offspring with the preferred characteristic , repeat until all the children have the preferred characteristic
name all gas tests
oxygen , relights glowing splint
hydrogen , lit splint burns with a squeaky pop
carbon dioxide , turns limewater cloudy
chlorine , bleaches blue damp litmus paper
calculate the energy transferred of a device that is on for 5 minutes that has a current of 24 amps and a resistance of 30 ohms
5184000
calculate a when, b=7 , c=9 , A=104 degrees to 1DP
12.7
list what you need to do for every question in paper 2
1 select the true statements
2 inference
3 analysis
4 compare perspectives
5 argue a point convincingly
describe how your finger being poked by a needle leads to your hand moving away
receptor , sensory neurone , synapse , CNS , synapse , motor neurone , effector/muscle
metal carbonate + acid -> ?
salt + water + carbon dioxide
calculate the vertical distance a 500g object can travel at 50m/s to 1 decimal place
g=9.8
625=GPE
127.6m