We need to be careful when working in the lab, to avoid accidents and harm ourselves or somebody else…
Let´s remember some lab safety rules!
Let´s think together to find the safety rules we need to follow in our lab!!
We are writing our own safety rules!!! We want to work safely and avoid accidents !!!
And we want to show them in a video
Hello S2!!
We will be working together on Tuesdays, Wednesdays and Fridays, both in the classroom and in the lab.
You will need your book, Biology for IGCSE by Mary and Geoff Jones, 3rd edition, and a folder with folios to keep tests, lab reports and any note taking we do in class.
Add as well, some graph paper for graphs, tables and charts, too.
On Fridays, whenever possible, we will be working with BYODs, as well!!
Remember that if you are absent to the afternoon lesson in the lab, you miss the activity…try to avoid this as much as possible!!
And bring black pencil and eraser on Wednesdays, for your biological drawings…and for all your practical work.
I wish and hope we share a whole year full of learning and enriching time together!!
A new year is starting today at school…
We have a long way to go, together… Sometimes the way will be easy, gentle and kind…
Sometimes we might have to undergo difficulties…It is here when we would need to believe in ourselves and never give up!!
We will be working together on Tuesdays, Wednesdays and Thursdays both in the classroom and in the lab.
You will need a book, Biology for IGCSE by Mary and Geoff Jones, 3rd edition, a folder with folios to keep tests and all your lab reports.
Remember that if you are absent to the afternoon lesson in the lab, you miss the activity…try to avoid this as much as possible!!
And bring black pencil and eraser on Wednesdays for drawings, tables, graphs…
I wish and hope we share a whole year full of learning and enriching time together!!
Let´s share a video that shows “Biology” all around us…
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In this investigation we will investigate the differences in composition between inspired and expired air. This is limited to O2, CO2 and water vapour but this investigation will observe temperature.
This investigation will remind you of the basic tests for CO2 and O2.
Equipment
Safety considerations
Method
For each of the steps below, you will need to record your observations. Read the method carefully.
a. Record the temperature of a thermometer. Blow gently onto the thermometer. record the temperature again.
b. Exhale gently onto the mirror. Test the vapour with cobalt chloride paper and record your results.
c. Pour limewater into the boiling tube to about a third of the way up. Pierce a papel towel with the straw and use the paper towel as a makeshift lid to the boiling tube. Blow gently through the straw into the limewater for 10 – 15 seconds and record the change.
d. Light a wooden splint and extinguish the flame but allow it to remain glowing . Exhale lightly onto the glowing splint and record your observations.
Recording data
1 For each of the tests, record your observations in the spaces below
a. Blow onto thermometer
………………………………………………………………………………………………………………………………….
b. Exhale onto mirror
………………………………………………………………………………………………………………………………….
c. Blow into limewater
………………………………………………………………………………………………………………………………….
d. Exhale on glowing splint
………………………………………………………………………………………………………………………………….
Analysis
a. Blow onto thermometer
………………………………………………………………………………………………………………………………….
b. Exhale onto mirror
………………………………………………………………………………………………………………………………….
c. Blow into limewater
………………………………………………………………………………………………………………………………….
d. Exhale on glowing splint
…………………………………………………………………………………………………………………………………
Source: Practical Workbook by Matthew Broderick
Investigation 12.2 Expired and inspired air, pages 104 and 105
https://www.abpischools.org.uk/topic/breathingandasthma/1/0
Surprising facts about the respiratory system
