Yes, it is.
According to my research and personal experience, both alder and agathis are considered soft woods, but I believe alder is the harder of the two. But wood densities can vary greatly. Agathis is in the pine family, so it would stand to reason that it's soft. The alder wood guitar bodies that I own don't seem that soft to me! Hope that helps.
A black alder is a variety of tree, Alnus glutinosa, of many practical uses, or the wood which grows on this tree.
maple is a different colour to alder and probably one will be stronger but im not sure
Native Americans used alder bark to treat insect bites, poison oak, and other skin irritations.
Mahogany or Alder.
as per poison control they are none toxic, http:/www.chop.edu/service/poison-control-center/resources-for-families/berries-and-seeds.html
Alder is fine as firewood. It burns fine but it burns fast as it is not a very dense wood. Denser woods burn hotter and slower.
They are flat boards, about the size of a shingle, that often get used to grill fish.
No, it's poison to dogs.
Burnt wood is essentially sterilized carbon. That won't hurt your dog, with one exception: If the "burnt wood" is burned lumber that was pressure treated, yes, it could poison your dog. But a burnt tree limb, or log of ordinary fire wood? No.
no they dont