the place a river divides before entering a larger body of water

a group of plants that grow on dead materials and have no flowers, e.g. mushrooms

a step-by-step problem-solving feature

an ancient period; something made a long time ago

the action of making something move in a different direction

a disease of the liver that causes inflammation, yellow skin and a fever

a single-celled fungi used to make bread and beer

a common, soft, silvery white metal that is usually used for farming or industrial purposes

to take away, e.g. 20 - 5 = 15

the amount you can see through something