by Milan Sanader | Jan 26, 2021 | Gr. 11-12 Biology, Gr. 11-12 Chemistry, Gr. 11-12 Physics
Trees create immense negative pressures of 10’s of atmospheres by evaporating water from nanoscale pores, sucking water up 100m in a state where it should be boiling but can’t because the perfect xylem tubes contain no air bubbles, just so that most of it...
by Milan Sanader | Jan 27, 2020 | Gr 1-3 Science & Tech, Gr 4-6 Science & Tech, Gr 7-8 Science & Tech, Gr 9-10 Science, Gr. 11-12 Biology
Eucalyptus deglupta is commonly known as the Rainbow Eucalyptus because of its unique way of shedding its bark. Once shed, the inner bark that is revealed is bright green, but eventually matures to blue, purple, orange, and eventually maroon. The rainbow eucalyptus...
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...
by msander | Aug 23, 2017 | Gr 4-6 Science & Tech, Gr 7-8 Science & Tech, Gr 9-10 Science, Gr. 11-12 Biology
Our early ancestors relied on lightning to cause forest fires, from which they could collect coals and burning sticks to help them cook food and clear land. Yet, it wasn’t just humans who benefited from these natural phenomena. Even as they destroyed trees, fires also...
by cbrookallred | Mar 12, 2015 | Gr 1-3 Science & Tech, Gr 4-6 Science & Tech, Gr 7-8 Science & Tech
Contributed by Les Asselstine. Help your students become more aware and knowledgeable about the natural environment in their community. This can be done by examining natural communities near fences, under logs, and in cracks of the pavement. One particularly good...
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