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Onions in focus
Title: Onions in focus
Category: Science & Technology / Computers and Cybernetics
Details: Words: 312 | Pages: 1.3 (approximately 235 words/page)
Onions in focus
Aim: To investigate onion cells and to practise using the microscope.
Materials & Equipment:
- Glass slide
- Cover slip
- Onion layer (1 cell thick)
- Iodine stain
- Microscope
- Water & syringe
Method:
1) If necessary, carefully clean the cover slip and glass slide (always hold the glass by the edges)
2) From a piece of onion, carefully peel a layer of its skin (one cell thick) and put it on the glass slide.
3) Once you have made sure …showed first 75 words of 312 total…
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…showed last 75 words of 312 total…that no air gets trapped underneath. Trapped air makes it harder to see.
We stained the onion skin with "iodine stain" to make the cells stand out.
We should avoid getting air bubbles trapped under the cover slip to have a clear view of the cells.
Conclusion:
In this experiment I have learned how to better use different parts of the microscope. I also discovered the different shapes of the onion cell and their colours.
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275 words per page