It was a great experience to participate Stand-Up Science Battle last week! I was waiting for this type of event for so long. Science have to be popular and interesting!
So you can present whatever you want about science but there are several rules:
1. You have only 3 minutes to talk about your breathtaking activity.
2. Keep your speech free of too much scientific words that are not so popular among non-interested people.
This is event appeared tough one for me. 3 minutes is incredibly short period. Explaining every word is unacceptable in this case. So the end of my presentation was clipped.
I was talking about studying of magmatic rocks. From the very beginning - crystals, mineral grains; to large magmatic provinces. I have tried to show that studying texture, structure and minerals could give us enough information to suppose geological setting and conditions of crystallization.
You are looking at the texture (the large crystal and fine-grained ground mass) you already know that this is volcanic rock. The rock formed from lava erupted on the day surface. Plagioclase phenocryst, Shipunskiy cape, Kamchatka.