General Thoughts: Science (3 Viewers)

[zombies]

I didn't think red shift was in the syllabus.. maybe I'm wrong but I don't remember learning about it in class. I think that's in the yr11 syllabus.

 

[girlworld_club]

i will print shot the balloon experiment for you guys so you can see for yourself.

 

[CrackerMo]

Hey, can anyone tell me if iron nails rust faster in water or salt water?

 

[Blurgh]

I didn't think red shift was in the syllabus.. maybe I'm wrong but I don't remember learning about it in class. I think that's in the yr11 syllabus.

Second. We didn't learn it in class, nor did i see that in my text book.

 

[Deliriously]

red shift was evidence for the expanding universe theory

 

[zannasheayarrow]

Red shift is evidence not a theory in itself. We did the experiment as well... Red shift is the doppler effect - red shift is based on the absorption of helium. The more red shifted the light the further away the star.

 

[Blurgh]

red shift was evidence for the expanding universe theory

Is expanding universe theory same as Big Bang?

 

[zombies]

Second. We didn't learn it in class, nor did i see that in my text book.

Yep. I think a lot of schools would be learning extra content rather than just the BOS stuff (my school does a a bit extra but not much) and so you guys are probs just already doing some yr11 work.

 

[avhead]

Yeah I put galaxies + red shift for that question too (Hope that's right!). I second that lightbulb one, what was the answer? :\

 

[starryblue]

umm...guys, the science test is over so chill...good luck for maths/history and geo tomoz!

 

[zannasheayarrow]

Hey, can anyone tell me if iron nails rust faster in water or salt water?

Salt water - think about erosion near the sea.

 

[zannasheayarrow]

Is expanding universe theory same as Big Bang?

The big bang theory is that the universe started as a singularity etc. the expanding universe theory is that the universe is still expanding at an increased rate.

 

[RealiseNothing]

Red shift and expanding universe are both right

 

[CrackerMo]

Salt water - think about erosion near the sea.

How is erosion related to rusting? Erosion needs no oxygen...

 

[Blurgh]

How is erosion related to rusting? Erosion needs no oxygen...

I think he meant corrosion.

 

[Deliriously]

Is expanding universe theory same as Big Bang?

I think the the big bang is different as it was the theory saying the universe began from a singularity while the expanding universe theory suggests that galaxies will continue to move apart and there was only one big bang. (The other theory was pulsating/oscillating universe theory)

 

[RealiseNothing]

I thought the nail one was the test tube with water and oil?

 

[girlworld_club]

lol. wtf? it has nothing to do with erosion, but the answer is salt water.

 

[hayabusaboston]

Balloon and dots one:

Galaxies
Red Shift

You can't just say red shift, It asked for "Which theory is being represented by the balloon expanding?" red shift isn't a theory, it was Galaxies and the Inflationary model of the big bang theory

 

[zannasheayarrow]

I think he meant corrosion.

Yes, SHE did. I realised my mistake after sending the message.