Introduction
Problem
Hypothesis
Why you picked this topic
Goal of your experiment Electricity is the flow of energy. Electricity changed everything from 100 years ago to now. We used to use candles, but now we can use electric light bulbs. These modern electric inventions were made by scientist like Benjamin Franklin, Thomas Edison, and Nikola Tesla. (U.S. Energy Information Administration, Electricity Basics.) Electricity moves through a circuit. A circuit is a closed path or loop around which an electric current flows. Circuits are normally made by linking electrical components together with pieces of wire cable. In a flashlight, there is a simple circuit with a switch, a lamp, and a battery linked together by a few short pieces of copper wire. When you turn the switch on, electricity will flow around the circuit, but if one of the wires are broken, for example, the flashlight will not light. (Woodford, C., Electricity) Wind is air that is in motion. This wind is caused by uneven heating of Earth’s surface by the sun. Because of Earth’s surface being made of very different types of land and water, it absorbs the sun’s heat at different speeds. For example this uneven heating can be found in the daily cycle. The daily cycle is the air above the land heats up faster than the air over the water. Then, the warmer air over the land expands and rises, and the heavier, cooler air rushes in to take its place creating wind, but at night the winds are reversed because the air cools more rapidly over the land than over the water. In the same way, the atmospheric winds that circle the Earth are created because the land near the Earth’s equator is heated more by the sun than the land near the North and South Poles. (U.S. Energy Information Administration, Renewable Wind) Today, wind energy can be is used to generate electricity. For example windmills produce energy.