Elodea with Salt Solution

Today in science we did an experiment with elodea. It was pretty cool. When the salt solution was running through the cells it looked darker and smaller. This is because plasmolysis took place. Plasmolysis is the process in plant cells where the membrane pulls away from the cell wall due to the loss of water through osmosis.So basically it's when the water in the cell leaves so the organals clump together.

Dengue Fever!

This week we had to make a public service announcement in science. We pick a disease and studied about it. I pick dengue fever and made a radio news report. Enjoy!

~Hana

Viruses

Over the past couple of weeks we have been working on viruses. My group had made a video on them (see on past post). Here is some information on viruses:

They are a non-living pathogen that needs a host cell to live in. Some examples of the virus are, Rhino Virus (cold), Small Pox (small pox), and Influenza (flu). Viruses cause Hepatitis B, aids, HIV, Cold, Flu, Chicken Pox, Small Pox, and Yellow fever. Viruses are much smaller than protist and bacteria. You can only see them under a electron microscope. They are a nano-meter. They get inside the human body be sneezing, coughing, exchange of saliva, touching, animal bites, and insect bites.They attack cells by injecting their DNA into the cell making them to produce many viruses, ruining millions of cells because viruses over work them.

Virus Video

This week, we worked in groups in science. Some groups on protist and bacteria, but my group work on viruses. The project was to teach the class about viruses. We could do anything we wanted to. My group, Amy, Jack, and Phillip, did a video. The will explain all about viruses.
Enjoy!
~Hana