Key words 3. When pipetting, minimize splashes by slow delivery.
4. Always clean spills using gloves and paper towels that have been soaked in disinfectant.
5. Keep doors and windows closed while you are working. 6. Wipe down surfaces after use. 7. Wash your hands before leaving the lab.
8. When you wash your hands, wash them thoroughly for at least a minute and keep the soapy water on your hands for at least 30 seconds.
We’ve also had accidents with centrifuges. Those machines at the back. Read the safety notice: “Ensure the lid is fully open before removing the contents”.
Many accidents are trips and falls. Avoid these by keeping the floor clear of bags and coats – put them in the lockers. Keep safe by being aware of everything in your environment.
I’m going to show the video now, but first, are there any more questions?
ANGELA: Yes, you mentioned disinfectant. I can’t see any here. Where is it kept?
PROFESSOR LEACH: Good point. It should be on every bench. We’ll put some out in a minute.
PETER: You said we’re going to experiment with some water samples. Do we have to write a report?
PROFESSOR LEACH: Yes, I’ll explain all that after the health and safety video. Let’s watch it now.
Unit 3, Lesson 4, Task 2
DR CHARLES: Good morning, everyone. I’m Dr Charles and this is Lecture 1 in the Hydrology course. I hope you are all in the right place! Genetics 1 is in the next lecture theatre if anyone wants to move. Today, I’m going to talk about the water cycle, although we should refer to it by the technical term hydrologic cycle, that’s H-Y-D-R-O-L-O-G-I-C.
First, I’ll give a brief outline of the basic cycle to remind you about what I’m sure you already know from school. Then we’ll start looking at the different stages in the cycle in much more detail, in particular at the roles played by geology and vegetation in the process.
There are three main stages in the hydrologic cycle. Let’s start where most water – something over 90 per cent – is stored on the earth, the ocean. In the first stage, water is evaporated from the surface of the ocean by the heat of the sun and by air movement. The resulting water vapour is carried in the atmosphere, often visibly as clouds. When clouds reach land, in particular hills, the water condenses and falls as rain. This stage is known as precipitation, that’s P-R-E-C-I-P-I-T-A-T-I-O-N. In the final stage, runoff, that’s the two words run and off together as one word, some of the water runs from the land back into the ocean through river networks. But what happens to the rest of the water?
204 ACCESS EAP: Foundations
pipetting delivery spills have been soaked disinfectant wipe down surfaces thoroughly soapy centrifuges ensure the lid the contents accidents trips falls avoid by keeping ... clear of the lockers by being aware of bench to experiment
Key words
hydrology genetics technical hydrologic a brief outline basic in detail the roles played by geology vegetation stages the earth the ocean vapour the atmosphere condenses precipitation runoff
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