School Certificate Science MARATHON (2 Viewers)

[Mudkip94]

question: make a experiment of creating a natural indicator.

Blend red cabbage. Filter out juice.

 

[Riot09]

use lemon tea or juice or something

 

[Riot09]

q.explain the term valency and provide 1 example using any element.

 

[muzeikchun852]

q.explain the term valency and provide 1 example using any element.

valency or charages on ions come from the number of electrons lost or gained in order to obtain a complete outer shell. example - calcium in group II loses two electrons and has a 2+ charage.

QUESTION: differences between mitosis and meiosis

 

[annarh-saur]

QUESTION: differences between mitosis and meiosis

Mitosis = Cell division for growth, delvelopment and repairing of cells.
Meiosis = Cell division for sex cells - reproduction.

Question: Explain Jean Lamrock's theory.

 

[supre]

Question: Explain Jean Lamrock's theory.

his theory stated that an organism can pass on characteristics that it acquired during its lifetime to its offspring.

Question: How is DNA mutation beneficial to humans?

 

[muzeikchun852]

Question: How is DNA mutation beneficial to humans?

mechanisms for repair. thats the only one i can think of.

QUESTION: wat is a superconductor?

 

[Mudkip94]

QUESTION: wat is a superconductor?

When a thingy has no resistance or magnetic field.

Has anyone else noticed the questions here are kinda repeating?

 

[Mudkip94]

Question: How is DNA mutation beneficial to humans?

So humans can adapt to stuff? Like evolution 'n' shit?

 

[Riot09]

list 3 types of electromagnetic radiation and identify a use for each of them.

 

[Mudkip94]

list 3 types of electromagnetic radiation and identify a use for each of them.

• X-ray; medical purposes
• visible; fiber optic (communication)
• radio; communication.

 

[Riot09]

q.explain how faults are formed.

 

[Mudkip94]

q.explain how faults are formed.

Plate tectonics.

My Question: Name an animal or plant and outline how it has adapted to it's environment.

 

[sam5]

Plate tectonics.

My Question: Name an animal or plant and outline how it has adapted to it's environment.

English Pepper Moths were originally white. When industrialisation occured, the trees became polluted with carbon and turned black instead of being their original white bark colour. The rare, black moths (formed from natural mutations) survived as they better camouflaged on the trees and were eaten less by birds, whereas the white moths didnt camoflague anymore and were eaten. Thus, the moth population bred in black moths, and thus the moths had successfully adapted to the changing environment.

This sounds like a stupid story, but its a true example (u would be able to find it easily on the net or in textbooks).

These questions are too fuckin easy kids.

My Question: Explain the role of T cells in formation of acquired immunity. lol jk. i love takin the piss out of the school certificate. Too easy compared to hsc exams.

Actual Question: outline the ethical issues associated with genetically modified food. ( i think that is in ur year 9 course).

 

[Riot09]

1.should we be playing "god"

2.is it right to interfere with nature

3.some ppeople might be allergic to gm foods

q.outline ohm's law.

 

[nae_13]

V=IR.. as voltage increases, current increases proportionally (if resistance is constant)

q.name the evidence for evolution

 

[4025808]

V=IR.. as voltage increases, current increases proportionally (if resistance is constant)

q.name the evidence for evolution

Charles darwin and the Theory of evolution; natural selection. Natural selection is the process by which heritable traits that make it more likely for an organism to survive and successfully reproduce become more common in a population over successive generations. It is a key mechanism of evolution.

Mutation
Gene flow
Genetic Drift
Adaptation... and yeah
​

 

[nae_13]

its actually

pentadacyl limbs
transitional forms
common ancestry
embryology
and evidence given by fossils

 

[sam5]

its actually

pentadacyl limbs
transitional forms
common ancestry
embryology
and evidence given by fossils

its actually this u smart ass

Paleontology including transitional fossils
Biochemistry including amino acids sequences
Comparative Anatomy including pentadactyl limbs and xylem
Comparative embryology including the fish gills for zygotes
Biogeography including continental separation and the Darwin/Wallace Line

 

[zxreth]

what are trans-genic species?? list advantages and disadvantages.