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Horizon Education and Media
Lab safety
Lab safety
Labs in this course may expose you to biohazards.
Tap on the image to load and read the infographic "What is Biosafety"
Lab safety
Lab safety
Tap on the image to see how you can avoid getting sick from biohazards.
Wash your hands before and after collecting or using the pondwater. Use gloves if you have them.
After you are finished, clean everything with a dilute bleach solution. Or run in the sterilize cycle of the dishwasher.
Pondwater Popsicles & WInogradsky Column
Pondwater Popsicles & WInogradsky Column
Pond Water Popsicles.docxWatch the video Impossible Life Under the Ice
Complete the activity outlined in the multipage document Pond Water Popsicles Investigation Activity.
Write notes in your Google Classroom 1:1:4 acticity sheet.
Long-term Project: Winogradsky Column
Long-term Project: Winogradsky Column
Bacteria are too small to see clearly under a regular microscope, other than as tiny dots. However, one way of viewing them is to grow them in an environment such as a petri dish or a Winogradsky column, where their colonies become visible as a cluster or colorful film.
In a Winogradsky column, bacteria grow slowly in a dirt and water environment enriched with sulfur, carbon, iron, and calcium. The bacteria separate into layers, each layer feeding the other in a cooperative community that takes a few weeks to establish.
NASA scientists envisage that life on Europa could look similar to the layered life in the Winogradsky column.
From the desk of Hannah Robinson
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