Local trees and the wood they give
More than 100 tree species grow in our country’s forests. All trees fall into two groups: coniferous (pine, larch, juniper, spruce) and broadleaved (oak, beech, birch, aspen). The wood of every species has its own pattern, called texture. By difficulty of working, woods are divided into three: soft (aspen, linden, pine), hard (oak, birch) and very hard (white acacia, beech). Wood can be worked well with cutting tools, joined with glue and nails, and looks attractive. Its drawbacks: it spoils with moisture, warps on drying and darkens faster; knots and worm holes count as defects, though they can be useful in decorative items.
Tree classification: with an adult, observe 5 trees in the school garden or street and fill a table: name – leaves (needle or broad) – wood (soft/hard). Only observe; do not break or cut branches.