Wood is what the trunks and branches of trees are made from. Trees get thicker as they grow, so when you cut them down you can see rings of colors in the inside of the tree, like in the picture. When you cut a tree lengthways the rings become lines called grain, which you can see in most things made out of wood.
Wood is used to make houses, furniture and some toys.
Scientific name: artemisia absinthium
Wormwood is a perennial shrub that grows to about 1 metre high. It has silvery grey leaves and small yellow flowers. It is native to parts of Asia and Africa. It grows well in drier climates and will tolerate poor soil. It is very easy to grow from hardened cuttings.
Wormwood is an ingredient in the drink absinthe and is used to flavor some other drinks and some dishes.