Lesson plan for the surface tension experiment.
Video demonstration of the experiment.
Surface tension has to do with the intermolecular forces between atoms and molecules at the surface of a liquid. For example, when a drop of water is placed on a table, it doesn't just flow and spread in all directions, but instead forms a 'dome' shape, or nearly a hemisphere. The surface tension of water is strong enough to hold the drop in this shape, rather than forming a flat, spread out puddle of water. This experiment provides a way for students to compare different liquids against each other to determine which have stronger surface tensions than the other liquids. All one needs are different liquids that are available, and any method or piece of equipment that allows you to create individual drops of each liquid.
This experiment complies with Sierra Leone WASSCE 2016 standard:
Chemistry syllabus: Section A, Topic 7.0 STATES OF MATTER, Part c.i LIQUIDS
Wednesday, July 1, 2020
Biology Activity - How vaccinations help slow the spread of disease
Lesson plan for how vaccinations help slow the spread of disease.
Video description for how vaccinations help slow the spread of disease.
For students who have experienced the global COVID-19 pandemic, it is vital for them to understand how disease spreads, and what doctors and scientists try to do to try and minimize the spread of disease. Because the COVID-19 virus was a brand new organism in 2020, there was no vaccine any country could use to help slow down the spread. Many groups are trying to produce an effective vaccine, so when it comes back in the future (assuming it will be a seasonal virus, similar to flu viruses being seasonal in many countries) the vaccine can help many people not become seriously ill or die.
This activity can help students better understand the importance of a vaccine, and how it can help reduce the number of people infected by the virus, and help reduce the number of people who will become sick or die.
This lesson complies with the following standard:
Biology Syllabus: Section A, Part C BASIC ECOLOGICAL CONCEPTS, Topic 8.d.ii IMMUNIZATION, VACCINATION AND INOCULATION (CONTROL OF DISEASES.)
Video description for how vaccinations help slow the spread of disease.
For students who have experienced the global COVID-19 pandemic, it is vital for them to understand how disease spreads, and what doctors and scientists try to do to try and minimize the spread of disease. Because the COVID-19 virus was a brand new organism in 2020, there was no vaccine any country could use to help slow down the spread. Many groups are trying to produce an effective vaccine, so when it comes back in the future (assuming it will be a seasonal virus, similar to flu viruses being seasonal in many countries) the vaccine can help many people not become seriously ill or die.
This activity can help students better understand the importance of a vaccine, and how it can help reduce the number of people infected by the virus, and help reduce the number of people who will become sick or die.
This lesson complies with the following standard:
Biology Syllabus: Section A, Part C BASIC ECOLOGICAL CONCEPTS, Topic 8.d.ii IMMUNIZATION, VACCINATION AND INOCULATION (CONTROL OF DISEASES.)
Biology Activity - Making a 3D model of a cell
Video demonstration of making a 3D model of a cell.
The basic unit for any type of life is a cell. Whether it is a single-cell organism in a lake or pond, or a tree or human being made of trillions of cells, all animal cells have effectively the same structure and components (organelles), and all plant cells have effectively the same structure and organelles. Animal and plant cells are eukaryotes, meaning they have a true nucleus with the genetic material, and various organelles suspended in the cytoplasm of a cell.
This activity uses paper so students can more easily create a three-dimensional model of a cell, and identify the structure of cell and begin to learn what each organelle does for the cell.
The basic unit for any type of life is a cell. Whether it is a single-cell organism in a lake or pond, or a tree or human being made of trillions of cells, all animal cells have effectively the same structure and components (organelles), and all plant cells have effectively the same structure and organelles. Animal and plant cells are eukaryotes, meaning they have a true nucleus with the genetic material, and various organelles suspended in the cytoplasm of a cell.
This activity uses paper so students can more easily create a three-dimensional model of a cell, and identify the structure of cell and begin to learn what each organelle does for the cell.
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