A variable is anything that can change in an experiment!
verable
One is the sudy of human ,enviroment while the other is about.production,consumption which verable into wealth
Scientists test hypotheses using the scientific method. First, there is a question posed about a phenomenon. Then, the hypothesis is created about what the scientist thinks will happen when it is tested. Next, the scientist will create an experiment that will answer the question. With this, the scientist gathers materials and performs the experiment they designed. The experiment should include a control group (one that does not have anything changed), that way you can see the difference between variables. The scientist can only change one variable at a time. As the scientist is conducting the experiment, they should be logging at the results. Once the experiment is done, they should look at the data and see what it proves. Does it prove the hypothesis? Does it go against the hypothesis? Next, scientists generally see how they can apply the results to real life. This goes a little bit beyond your question, but an understanding of the scientific method is important to understanding how hypotheses are tested.
Old English literary works include genres such as epic poetry, hagiography, sermons, Bible translations, legal works, chronicles, riddles and others. In all there are about 400 surviving manuscripts from the period, a significant corpus of both popular interest and specialist research.The most famous works from this period include the poem Beowulf, which has achieved national epic status in Britain. The Anglo-Saxon Chronicle is a collection of important early English history. Cædmon's Hymn from the 7th century is the earliest attested literary text in English.