Gaby Elsusu

QUESTIONS FROM PRACTICAL

1. Explain how this activity relates to the spreading at the mid-ocean ridges.

   It relates to spreading at mid-ocean ridges because when gravity pushes up the lava from the bottom it emerges out of the ridge and goes up and then flows down the sides.

2. Describe what you noticed about the height of the paper as it emerged from the gap compared to the paper further out

   The height was very tall but also not long but the paper further out was longer but not as high. This describes that when it emerges from the gap it gets to a certain height and then flows down the sides

3. Identify which of the strips you coloured would be the ‘oldest’ rock and which would be the ‘youngest’ rock

   The strip at the ends of the papers (the yellow strip) would be the oldest as they are the rocks that emerged first. The youngest rock would be the strips closest to the paper (the red strips) as they emerged out last.

4. Identify which of these strips would be the first to be ‘swallowed’ by an ocean trench

   The closest strip (red) would be first to get swallowed because it is the closest to the mid-ocean ridge and also the closest to the ocean trench. The youngest rock emerged last so it will be the closest to the edge where the trench is and will go back in first.

In this practical I investigated mid-ocean ridges and i also investigated the process and how ocean ridges form. I also investigated the part of it such as lava flow, ocean ridge, trenches, gravity, etc..

In this practical I learnt that gravity pushes up lava and this comes out of the mid-ocean ridge in the middle. This lava goes up to a certian height than flows down da sides of the ridge. Ocaen ridges are formed underwater so it is basically like an underwater volcano. I also learnt that rocks have layers because of the way they are formed. Also the rocks that emrge first out of the ocean ridge are older than the rocks that emerge last.