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Results for: 'Heavy metal'

11:07

Chapt 2 Chemical and Physical Hazards

By: tpritcha

This is a video identifying chemical hazards and their sources. Physical hazards are also identified and control measures are identified.

0:42

Traditional Collection Methods

By: uvmext

Traditional methods of sap collection have changed over time. Initially, Native Americans created gashes in the stem, and directed sap into wooden or bark vessels. Early spouts were created by hollowing out small twigs, which were inserted into ta...

2:48

2003-12-08 MRG The Day After

By: waw

Early season heavy snow still looking good

1:37

Maple Seeds

By: uvmext

Sugar maple flowers that are fertilized in spring, will develop into mature seeds in late summer. The seeds come in the form of winged samaras (sometimes referred to as helicopters or whirligigs). Sugar maple samaras develop in pairs but generally...