Relating Speed to Distance and Time

Today in Science 10, we calculated our speed, or our change in distance per change in time. We calculated our speed when hopping, walking backwards, walking regularly, and speed walking for both 5 m and 10 m distances.

Edible Cells!

Last week in Biology 30, to conclude our unit on cell structure and function, we created models of plant and animals cells. The cells showcased not only our knowledge of the cell and its parts, but also of our creativity and attention to detail. Check out our work!

Amazing Technology!

Last week the biology 20 students were looking at different protists and thanks to some amazing technology (digital microscopes & laptops) we were able to take some great photos of what we were looking at. Can you identify the protists shown in these images?

Why we do not store liquids in plastic baggies.

And the results are in.....It was the iodine that diffused in our Diffusion in a Baggie Lab and not the cornstarch! We know this because the color of the solution in the baggie turned black! Had the cornstarch diffused through the baggie, the solution in the beaker would have turned black and it didn't! The bag then is semi-permeable, allowing the iodine to pass through but not the cornstarch. I guess this is why we do not store liquids in plastic baggies.

Mass of Reactants = Mass of Products

Using citric acid and baking soda, an erlenmyer flask and a balloon we showed that the mass of reactants does indeed equal the mass of products in today's Science 10 class. Atoms can not be created or destroyed. We are now ready to balance chemical equations.

Observing Chemical Change Demos

What an exciting Science 10 class! Today we saw eight different chemical reactions. It was hoped that we would discover the indicators of a chemical reaction. Check out the pictures below that show some signs that a chemical reaction has taken place. Remember the formation of a gas, formation of a precipitate, change in temperature, and a change of color,.

Blood Compatibility

Today in Biology 30 we discussed Blood Compatibility. Here are some pictures before and after the demonstration. Blood Type A was yellow. Blood Type B was blue. Blood Type AB was green (yellow + blue). Blood Type O was clear. If no color change occurred when the two bloods were mixed, then the blood was compatible. For example, in the picture when Blood Type A (yellow) was added to Blood Type A (yellow) the color remained yellow. However, when Blood Type A (yellow) was added to Blood Type B (blue) the color changed to green.