They give different streaks, although I forgot which one was which...dechirico wrote:Any advice distinguishing diatomite from chalk? I don't have a Rocks & Min box to practice with, so I'm afraid I'm a bit rusty in physical identification.
Rocks and Minerals B/C
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Magikarpmaster629
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Re: Rocks and Minerals B/C
Ladue Science Olympiad (2014ish-2017)
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dxu46
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Re: Rocks and Minerals B/C
Well, doesn't Chalk (limestone, containing carbonates) effervesce? Diatomite doesn't effervesce, at least. Also, Diatomite is lighter than Chalk (diatoms).Magikarpmaster629 wrote:They give different streaks, although I forgot which one was which...dechirico wrote:Any advice distinguishing diatomite from chalk? I don't have a Rocks & Min box to practice with, so I'm afraid I'm a bit rusty in physical identification.
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Magikarpmaster629
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Re: Rocks and Minerals B/C
If you're given HCl tests, which is certainly not always. But yes, that would work.dxu46 wrote:Well, doesn't Chalk (limestone, containing carbonates) effervesce? Diatomite doesn't effervesce, at least. Also, Diatomite is lighter than Chalk (diatoms).Magikarpmaster629 wrote:They give different streaks, although I forgot which one was which...dechirico wrote:Any advice distinguishing diatomite from chalk? I don't have a Rocks & Min box to practice with, so I'm afraid I'm a bit rusty in physical identification.
Ladue Science Olympiad (2014ish-2017)
A wild goose flies over a pond, leaving behind a voice in the wind.
A man passes through this world, leaving behind a name.
A wild goose flies over a pond, leaving behind a voice in the wind.
A man passes through this world, leaving behind a name.
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bhavjain
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Re: Rocks and Minerals B/C
What famous formations should we know? (ex. Giant's Causeway)
2017 Science Olympiad - (Invites TBD/Reg/State/Nats) - Division C
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dxu46
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Re: Rocks and Minerals B/C
You don't need to know them specifically, but you should include info for formations and such in a page for that rock/mineral that the formation is related to. For example, since the Giant's Causeway is made of basalt, in your Basalt section, you should put a picture and a bit of info on the Giant's Causeway.bhavjain wrote:What famous formations should we know? (ex. Giant's Causeway)
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