Junior Cert Science 2012 (HL & OL)

Leinsterr

nickys wrote: »

My daughter is really worried about physics
Can anyone help with answers for that section?

Yeh no problem. I'm confident I got close to full marks in physics. What qs do u hav

Leinsterr

EoghanIRL wrote: »

for the question on the ldr i drew a circuit with a ldr battery and led is that ok?

U need a light, not an led. By accident I drew the light outside the circuit. u need to draw the light from 2 different distances

Chicken and Cheese

That was a very odd paper indeed. It was harder than other years, definitely. I don't know why people were going around saying that was easy. Whenever I asked them, "did you get the carbon dioxide one?" or "did you get that train tracks one?" guess what? "No, I didn't get that one..." Some questions were quite strange, but it was generally not too bad. I usually find science easy, but that was a funny paper...

nickys

Leinsterr wrote: »

nickys wrote: »

My daughter is really worried about physics
Can anyone help with answers for that section?

Yeh no problem. I'm confident I got close to full marks in physics. What qs do u hav

Most of them sorry

A7XGirl

Did anyone draw a circuit with just an LDR and an ohmmeter for the LDR diagram?

Leinsterr

nickys wrote: »

Most of them sorry

I can't remember any of them. If she has any specific I cud answer. Not to sound like a prik but this is sort of pointless since she can't change what she has done. If for example she gets a lot of them wrong she cud feel bad throughout the summer thinkin she might do bad. Well any particular qs????

blobcat

EoghanIRL wrote: »

was the one with the straw refraction lads?

That's what I said anyway.

I hate school

I'm praying I scraped a C :L That test was horrible

yoyojc

Hi sorry but I'm a tad unsure of a few things! I'd appreciate anybody's help

There was one question about carbon dioxide burning or something does anyone remember the answer?

Also what kind of joint was that in the biology section?
Also when does the paper go up online

yoyojc

A7XGirl wrote: »

Did anyone draw a circuit with just an LDR and an ohmmeter for the LDR diagram?

Yes I did and I did it because I saw it in my revise wise I don't know why everyone else's is so complicated

ektec

:pac:haha I put down earthquake as it would shake the ground and the trackes would not be straight

yoyojc

iliketwixbars wrote: »

Oh right that one..yeah it was CO2 and Water vapour

No I don't think it was it was h2o and co2 because a hydrocarbon burns to produce water and carbon dioxide? Are we on the same question can someone verify this?

AnnaTorvFan

yoyojc wrote: »

Hi sorry but I'm a tad unsure of a few things! I'd appreciate anybody's help

There was one question about carbon dioxide burning or something does anyone remember the answer?

Also what kind of joint was that in the biology section?
Also when does the paper go up online

was that the graph question?
i remember something about how it was evaporatingwas the train tracks question rust?
i found that question really stupid tbh.

yoyojc

AnnaTorvFan wrote: »

was that the graph question?
i remember something about how it was evaporatingwas the train tracks question rust?
i found that question really stupid tbh.

Nope a separate question and yeah everyone is saying Heat on this but it was rust or corrosion or something everyone said it in my school and my teacher clarified it?

Oozamine

Also said rusting,but the one about expanding makes sense so id imagine theyd accept both imo

AnnaTorvFan

yoyojc wrote: »

Nope a separate question and yeah everyone is saying Heat on this but it was rust or corrosion or something everyone said it in my school and my teacher clarified it?

which question was it?
yeah, like the picture would of had to of been a bit more detailed for it to be heat imo.
and enviromental factor suggests rust = water + oxygen.
--
the paper: http://examinations.ie/archive/exampapers/2012/JC057ALP000EV.pdf

nickys

Leinsterr wrote: »

nickys wrote: »

Most of them sorry

I can't remember any of them. If she has any specific I cud answer. Not to sound like a prik but this is sort of pointless since she can't change what she has done. If for example she gets a lot of them wrong she cud feel bad throughout the summer thinkin she might do bad. Well any particular qs????

The one about the straws amd the question About alloys thanks

A7XGirl

This was probably a dumb thing to put, but I said that the cause was acid rain and it corrodes the train tracks..Will I get any marks?

AnnaTorvFan

Question 1:
a - calcium, protein
b - it can clot, transports around the body
haemoglobin
c - burning of fossil fuels causes a hole in the ozone layer
harmful UV rays from the sun can burn us, water levels rise
d - prevention of an egg being fertilised by sperm.
condom
e - brings water up the plant
- brings food down the plant
f - DNA
- Protein
g - hedge; its twigs can grow roots and grow.
h - hinge
movement in all directions
when the biceps contract the arm is raised, when the tricep contracts the arm is straightened. these are antagonistic muscles. antagonistic muscles are mussled that work in opposite directions.

Question 2:
a - Renal Artery : Brings blood to the kidney (blood is unpurified)
Kidney : Removes wastes and purifies blood.
Renal Vein : Brings purified blood to the blood flow and transports the wastes to the ureter.
Ureter : transports wastes to the bladder
Bladder : Mixes water with wastes.
Urethra : Excretion?
b - in : carbon dioxide out : oxygen
c - diagram : plant in light with one leaf covered in tinfoil.
explanation : leave a plant in light and cover one leaf with alumium and tinfoil. after 3 days take the leaf covered in tinfoil and a sample leaf from the plant. add a drop of iodine to both. the leaf that was uncovered changes colour with the iodine. the covered leaf turns blue black as no starch is there.

Question 3:
a - Self Dispersal
****ed up the plant thing completely.
Think i said the anther.
Ovary.
Dispersal?
b - Starch
Think i said amylase.
Think i said maltose.
Spit - Saliva

Question 4 :
a - Copper
Copper plating.
b - carbon dioxide.
red litmus turned blue.
c - hard water was flowing through the pipe and left calcium ion deposits.
limescale
d - Ca, Mg, Zn, Cu (I think)
e - ionic
complete transfer of electrons from outer shell from one atom to another. attraction between positive and negative ions. ie -> sodium chloride
f - orange juice
toothpaste
g - neon, nitrogen
h - so the water does not absorb it.
- water moved upwards and product the different inks with it
- they were lighter than the bottom colours

Question 5 :
a - Drawn
- it started to evaporate.
- believe i said 16degrees celcius?
b - nitrogen, carbon dioxide
- it would dry up in warm/hot areas
c - drew a test tube with lime water being sucked into.
d - the droplets evaporate @ 100degrees celcius

Question 6 :
a - Filtration - removing wastes from the water
Fluoridation - adding fluoride to the water
Chlorination - adding chlorine to the water
Screening - screening the water for toxens?
b - do not run in the lab as you may knock over acids and harm yourself
always wear goggles and lab coats when doing experiments
c - zinc + hydrochloric acid (could of said hydrogen peroxide, cant remember) => zincchloride and water

Question 7
a - the heating of something until it changes into a gas.
- heat?
b - direct current only goes one way, alternate current goes in all directions.
c - Refraction (bending of light)
d - Kettle : Chemical to kinetic
Battery : Chemical To Potential/Kinetic/Electric
e - rust
galvanising
f - bottom hole.
pressure increases with depth.
g - stops the current from overloading.
h - solar, wind
- wind : cheap and plentiful solar :(cant remember)
- wind : doesnt work in good weather, little brease. solar : only works in good weather as sunshine is needed.

Question 8
a - force per unit area
- drew graph.
- not in direct proportion, not a straight line graph through the origin.
pressure increased at a steady rate
- increase the boiling point
b - something like it tells them how much electricty they used and how it saves them money?
- amount of current in a circuit
- chemical : electrolysis magnetic : electroplating

Question 9
a - b = resistor, c = light
- a = provide energy, b = stop current from flowing
- drew. (this was easy as it was basically in our log tables)
b - build up of static electricty
c - like poles attract, unlike repel. force of attraction.
d - coudnt do in exam. guessing gravity and how it keeps us down.

^^ my answers. probably all wrong but yeah :P

Footy2k12

AnnaTorvFan wrote: »

which question was it?
yeah, like the picture would of had to of been a bit more detailed for it to be heat imo.
and enviromental factor suggests rust = water + oxygen.
--
the paper: http://examinations.ie/archive/exampapers/2012/JC057ALP000EV.pdf

Yeh but Heat and Heat Transfer is a Physics Chapter and the question came up in de Physics section:L So its de expansion of metals

Examking

AnnaTorvFan wrote: »

Question 1:
a - calcium, protein
b - it can clot, transports around the body
haemoglobin
c - burning of fossil fuels causes a hole in the ozone layer
harmful UV rays from the sun can burn us, water levels rise
d - prevention of an egg being fertilised by sperm.
condom
e - brings water up the plant
- brings food down the plant
f - DNA
- Protein
g - hedge; its twigs can grow roots and grow.
h - hinge
movement in all directions
when the biceps contract the arm is raised, when the tricep contracts the arm is straightened. these are antagonistic muscles. antagonistic muscles are mussled that work in opposite directions.

Question 2:
a - Renal Artery : Brings blood to the kidney (blood is unpurified)
Kidney : Removes wastes and purifies blood.
Renal Vein : Brings purified blood to the blood flow and transports the wastes to the ureter.
Ureter : transports wastes to the bladder
Bladder : Mixes water with wastes.
Urethra : Excretion?
b - in : carbon dioxide out : oxygen
c - diagram : plant in light with one leaf covered in tinfoil.
explanation : leave a plant in light and cover one leaf with alumium and tinfoil. after 3 days take the leaf covered in tinfoil and a sample leaf from the plant. add a drop of iodine to both. the leaf that was uncovered changes colour with the iodine. the covered leaf turns blue black as no starch is there.

Question 3:
a - Self Dispersal
****ed up the plant thing completely.
Think i said the anther.
Ovary.
Dispersal?
b - Starch
Think i said amylase.
Think i said maltose.
Spit - Saliva

Question 4 :
a - Copper
Copper plating.
b - carbon dioxide.
red litmus turned blue.
c - hard water was flowing through the pipe and left calcium ion deposits.
limescale
d - Ca, Mg, Zn, Cu (I think)
e - ionic
complete transfer of electrons from outer shell from one atom to another. attraction between positive and negative ions. ie -> sodium chloride
f - orange juice
toothpaste
g - neon, nitrogen
h - so the water does not absorb it.
- water moved upwards and product the different inks with it
- they were lighter than the bottom colours

Question 5 :
a - Drawn
- it started to evaporate.
- believe i said 16degrees celcius?
b - nitrogen, carbon dioxide
- it would dry up in warm/hot areas
c - drew a test tube with lime water being sucked into.
d - the droplets evaporate @ 100degrees celcius

Question 6 :
a - Filtration - removing wastes from the water
Fluoridation - adding fluoride to the water
Chlorination - adding chlorine to the water
Screening - screening the water for toxens?
b - do not run in the lab as you may knock over acids and harm yourself
always wear goggles and lab coats when doing experiments
c - zinc + hydrochloric acid (could of said hydrogen peroxide, cant remember) => zincchloride and water

Question 7
a - the heating of something until it changes into a gas.
- heat?
b - direct current only goes one way, alternate current goes in all directions.
c - Refraction (bending of light)
d - Kettle : Chemical to kinetic
Battery : Chemical To Potential/Kinetic/Electric
e - rust
galvanising
f - bottom hole.
pressure increases with depth.
g - stops the current from overloading.
h - solar, wind
- wind : cheap and plentiful solar :(cant remember)
- wind : doesnt work in good weather, little brease. solar : only works in good weather as sunshine is needed.

Question 8
a - force per unit area
- drew graph.
- not in direct proportion, not a straight line graph through the origin.
pressure increased at a steady rate
- increase the boiling point
b - something like it tells them how much electricty they used and how it saves them money?
- amount of current in a circuit
- chemical : electrolysis magnetic : electroplating

Question 9
a - b = resistor, c = light
- a = provide energy, b = stop current from flowing
- drew. (this was easy as it was basically in our log tables)
b - build up of static electricty
c - like poles attract, unlike repel. force of attraction.
d - coudnt do in exam. guessing gravity and how it keeps us down.

^^ my answers. probably all wrong but yeah :P

Ya most of them are wrong

A7XGirl

yoyojc wrote: »

A7XGirl wrote: »

Did anyone draw a circuit with just an LDR and an ohmmeter for the LDR diagram?

Yes I did and I did it because I saw it in my revise wise I don't know why everyone else's is so complicated

Oh good That was the last thing I looked at in the Revise Wise

AnnaTorvFan

Footy2k12 wrote: »

Yeh but Heat and Heat Transfer is a Physics Chapter and the question came up in de Physics section:L So its de expansion of metals

metals and rusting and all that is also a chapter in physics i believe :S

---

@examking.
FML >.<

Oozamine

I said the for the rusting that water oxygen and iron react and rust,
and for the tissue one,i said a group of cells working together

AnnaTorvFan

Oozamine wrote: »

I said the for the rusting that water oxygen and iron react and rust,
and for the tissue one,i said a group of cells working together

they were both definately right

yoyojc

AnnaTorvFan wrote: »

they were both definately right

I agree that rusting is right because water could be rainfall!!

I hate school

Are salts transported by the blood :P

AnnaTorvFan

I hate school wrote: »

Are salts transported by the blood :P

i think so :P

ohsurelook

Sorry - how dodgy a paper was that?

A full 18 mark question (wouldja be well)

And some question were a lot of guesswork...like they were coming at a load of the topics from a different angle than other years

iang198

I put down rust, but I'd say it was expansion because of it being in physics!😊