Quiz

BuzzFeed Staff, UK 

BuzzFeed

Were You Paying Attention In Science Class?

Magnesium [burns very easily](http://chemwiki.ucdavis.edu/Development_Details/Approaches/VVV_Demos/Burning_Magnesium) in air.

What's burns so brightly in air that you shouldn't look directly at it?

Different colours of ink are drawn up the paper different distances by the solvent.

What's happening in this picture?

What happens when you put blue litmus paper into acid?

Water is neutral, and substances with a neutral pH turn green.

What colour does water turn if you add Universal Indicator?

Useful for counting earthworms and flowers and not much else.

What is this piece of equipment called?

Which flame would you get when the valve on a bunsen burner is fully open?

Copper shows up [green-blue](http://www.bbc.co.uk/schools/gcsebitesize/science/edexcel_pre_2011/patterns/forensicsciencerev2.shtml), whereas calcium is brick red.

What would give off this green colour on a flame test?

The reaction produces [hydrogen and heat](http://antoine.frostburg.edu/chem/senese/101/inorganic/faq/sodium-and-water.shtml), and with enough heat that hydrogen will ignite.

What is being dropped into water here?

Iodine turns from [red to blue/black](http://www.bbc.co.uk/bitesize/standard/chemistry/plasticsandothermaterials/carbohydrates/revision/3/) in the presence of starch, and can distinguish between starch and other carbohydrates.

What would you use the iodine test to detect?

The Biuret reagent turns mauve/purple when it reacts with proteins.

What can you use the Biuret test to detect?

Hydrogen is lighter than air so the bubbles [float upwards](https://www.youtube.com/watch?v=d49TzVF1gmY). Setting methane bubbles on fire is also quite fun.

What kind of bubbles are being set on fire here?

Watch (and listen to) it [here](https://www.youtube.com/watch?v=-xk3VjeoAns).

What can you detect with the squeaky pop test?

Oh dear, you weren't paying attention in class, were you?

Well done! You can remember a fair bit from science class (or you're just good at guessing).

Congrats! All of that playing around with bunsen burners and chemicals paid off.

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Were You Paying Attention In Science Class?

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