A model dam can be made from a few items normally already found in the kitchen. Use a Tupperware of similar plastic container, some sand, rocks and water to create a model of a structure that retains water.Know More
To make a model dam, PBS Kids recommends placing sand in the plastic container and digging a trench in the sand that resembles the shape of a flowing river. Pick a point along the trench to build the dam. Place small rocks on it and enclose them with Popsicle sticks that stand upright. Pour a little water down the trench to start the river to see if the dam is constructed well enough to withstand the flow but still allow some water to enter the structure.
Dams are sometimes associated with levees or floodgates. Both are used to control water flow. But levees are designed to prevent water from flowing into regions. The purpose of a dam is to retain water that may also be transferred to other locations. In addition to water retention, dams can help generate electricity with the help of hydro power.
Natural causes and wildlife such as beavers help form dams. Dams can also be man-made. Man-made dams are classified by several factors, including size, height, structure and purpose.Learn more about Electricity
Batteries are made from multiple electrochemical cells that convert stored energy into usable electrical energy. For commonly available disposable batteries, the cells can be a combination of carbon, lithium, magnesium, silver oxide, alkaline zinc–manganese dioxide or nickel.Full Answer >
To make a solenoid, you need a hollow cylinder, a battery and lots of conducting wire. The wire must be wound dozens of times around the cylinder, with both ends connected to a battery. This allows the current to flow, replicating the effect of a bar magnet.Full Answer >
Thunder, the sound that follows lightning, comes from rapid air expansion around the lightning bolt. The heat from lightning causes the air around the bolt to reach temperatures of over 40,000 degrees Fahrenheit rapidly. The heated air compresses then explodes outwards, forming a shock wave and creating a loud noise.Full Answer >
To make a visible psi ball, you must first learn to feel energy and program your psi ball. After you master techniques of creating psi balls, you can attempt to make them visible by flaring.Full Answer >