by msander | Sep 5, 2019 | Gr 4-6 Science & Tech, Gr 7-8 Science & Tech, Gr 9-10 Science, Gr. 11-12 Biology
What is ”egg-shaped” even? I used to think it was the shape of a chicken egg. Then one day I saw a collection of eggs from lots of different bird species, and I realized just how many different kind of egg shapes there really are! I had to know why. And it turns out a...
by msander | Aug 26, 2019 | Gr 1-3 Science & Tech, Gr 4-6 Science & Tech, Gr 7-8 Science & Tech, Gr 9-10 Science
This is an image of an insect taken from a Huawei p 30 pro cell phone camera. When I compare that to images that I took in 1978 using a really good dissecting microscope with an optical camera, this is incredible. I could easily take these images and identify this...
by msander | Aug 19, 2019 | Gr 1-3 Science & Tech, Gr 4-6 Science & Tech, Gr 7-8 Science & Tech
This is a picture of my front lawn. You might see a decided absence of grass. When I first moved here, it took me almost 2 hours to cut the grass in the front and back yard. At my wife’s urging she suggested that we plant trees to make the busy road in front of our...
by msander | Aug 1, 2019 | Gr 4-6 Science & Tech, Gr 7-8 Science & Tech, Gr 9-10 Science, Gr. 11-12 Chemistry
Who would have ever thought that a plastic bag, some water, and a few pencils would have adults screaming with fear? Learn how to poke holes in a plastic bag filled with water without spilling a drop. Well, that’s the theory you’re going to test… and it’s wise...
by msander | Jul 22, 2019 | Gr 7-8 Science & Tech, Gr 9-10 Science
Did you know that you can cause a packet of ketchup to rise and fall on command in a bottle of water? People might even think that you have the ability to move objects with your mind! The truth is that you don’t have the gift of telekinesis. You actually just know a...
by msander | Jul 14, 2019 | Gr 7-8 Science & Tech, Gr 9-10 Science, Gr. 11-12 Biology
Trees can weigh hundreds or even thousands of tons, but where do they get this mass from? A few common answers are: the soil, water, and sunlight. But the truth is the vast majority of a dry tree’s mass comes from the air – it originated as carbon...
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