wood - Search
Results near Lauterbourg, Grand Est ·
Open links in new tab
  1. History

    A 2011 discovery in the Canadian province of New Brunswick yielded the earliest known plants to have grown wood, approximately 395 to 400 million years ago.
    Wood can be dated by carbon dating and in some speci… See more

    Physical properties

    Wood, in the strict sense, is yielded by trees, which increase in diameter by the formation, between the existing wood and the inner bark, of new woody layers which envelop the entire stem, living branches, and roots. … See more

    Hard versus soft

    It is common to classify wood as either softwood or hardwood. The wood from conifers (e.g. pine) is called softwood, and the wood from dicotyledons (usually broad-leaved trees, e.g. oak) is called hardwood. These nam… See more

    Chemistry

    The chemical composition of wood varies from species to species, but is approximately 50% carbon, 42% oxygen, 6% hydrogen, 1% nitrogen, and 1% other elements (mainly calcium, potassium, sodium, … See more

    Kizdar net | Kizdar net | Кыздар Нет