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Bottom left and top right are most reactive (Fluorine and Francium)...least reactive is probz the noble gasses.

I use SF4...absorption is when light is trapped in a substance e.g. opaque substances such as wood absorb light. reflection is when light bounces off a surface because it strikes at an angle greater than the critical angle e.g. red bike reflectors reflect incoming light from cars. refraction is...

Q) What does natural selection mean?

u forgot infrared :P

switch - turn circuit on and off conducting path/wire - to allow for the current to pass through energy source - something to provide the voltage load/energy user - something to use the energy

nebula>protostar>main sequence star>red giant>white dwarf if it is big then it turns into a blue supergiant, red supergiant, supernova, creates black hole and neutron star

not too sure... is it 2Mg (s) + O2 (g) --> 2MgO ? What are the types of electromagnetic radiation?

please post a question.

So i decided to make a marathon for science coz theres quite a bit of content to be covered. So heres how it works - i ask a question, then someone answers it and asks another question. Q1) what's the difference between ionic and covalent compounds?

I was looking through some past papers and noticed that there is a 10 mark and 20 mark question in each paper. I wanted to know the expected length (in words not pages please) of each response. -Thanks

Thanks!

So i was reading the macquarie hsc guide and it says that "all elements of ecosystems are interdependent. This interdependence makes ecosystems vulnerable" Then later on it says "ecosystems with a high degree of interdependence have a higher capacity to absorb change while ecosystems with low...

What would be some good examples for this question?

Does anybody have any info on this question: - Describe some responses of body systems to infectious and non-infectious diseases

It's a pyramid not a triangle.

1. 10cm (this is assuming that it is a square pyramid...I kind of did trial and error so I cant really explain it to be honest) 2. ok..so if you draw a sector (part of a circle) with the radius as 10 cm and the included angle = 240 degrees..you can work out the size of the arc by working out the...

do you have any past papers (CSSA etc.) for geo?

Thanks for the help. I was wondering whether 'additional content' could be tested in the exams. It says this in the SC science syllabus: Additional Content is not prerequisite knowledge for following stages but may be used to broaden and deepen students’ knowledge, understanding and skills in...

Does the SC only include the stage 5 syllabus or stage 4 as well?

Thanks!