Ielts 雅思 口语全攻略 Ideas and Examples for ielts speaking Jeremy Chiron

A Science Lesson or Experiment

Tell me about a science experiment (biology, chemistry) you have done.
You should say: what the experiment was about when it took place
whether it is a common experiment at school
and say what you thought of the experiment.

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  First time using a microscope: biology. Caution and precision was required.
  
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  Meaning of the word micro + microscope (microwave, microchip)
  
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  How does it work? Light goes through refractive glass = magnifies the image
  
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  Pulled one strand of hair, and placed it between 2 glass slides
  
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  Zoom = I could see scales (like a fish). Good condition = closed scales
  

Alright, this is a difficult topic but I am going to try my best to tell you about the first time I used a microscope at school. I was in middle school, in biology class. The teacher told us that this apparatus (=piece of equipment) was very expensive, and that we should use it with caution.
First of all, the teacher explained to us the meaning of the word "microscope." He said that micro meant extremely small, like in microwave, where the (electromagnetic) waves are " impossible to see, or a microchip, which is a very tiny computer component. And the word "microscopic" meant invisible to the naked eye. I thought it was quite fascinating.
The teacher also explained to us how a microscope works. It has a refractive glass and a light shines through different layers of this special glass in order to magnify (= enlarge) the object we want to observe.
Our teacher asked us to pull one single strand of hair from our head, and to place it on the glass microscope slide. We then placed a drop of water on it, and placed another slide on top to fix the hair in place.
When I looked through the microscope, I clearly saw that the hair was not flat, not smooth, but it was covered with flat scales, just like a fish. The teacher said it was called a cuticle, and we could apparently see the same surface on our skin or nails. I think I remember him saying that if the cuticles are closed, then the hair is in good condition. It makes the hair smooth and shiny. But if the cuticles are shattered (= crushed), or raised, it means you need to take better care of your hair and you should buy some hair conditioner.