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Decomposers are living things that get their energy from the waste materials of other organisms. The rainforest ecosystem relies on these organisms to break down waste materials into usable energy for other plants. Because of the abundance of life in…
No scale is needed to determine the weight of a sample in grams. A metric unit for measuring the mass of objects, grams are often used in science experiments. When you do not have a scale, you can make a…
Ions are hydrophilic or attracted to water molecules because the water molecules are polar, with a negative charge at one end and a positive charge at the other end. The positively charged end of the water molecule attracts negatively charged…
Gravity is the force that gives weight to objects and causes them to fall to the ground when dropped. Two major factors, mass and distance, affect the strength of gravitational force on an object. You witness the first factor in…
A third power polynomial, also called a cubic polynomial, includes at least one monomial or term that is cubed, or raised to the third power. An example of a third power polynomial is (4x^3-18x^2-10x) To learn how to factor these…
Coastal plains are flat, low-lying areas adjacent to coastlines. They may be separated from surrounding areas by hills or mountains, or they may transition gradually into higher ground. Partly because they were underwater at some time in the past, they…
Because they can be located almost anywhere in the United States, just about everyone knows something about the roly poly, or pillbug. The roly poly is an isopod, meaning it has an equal number of feet or legs on each…
Three phase power circuits are often used in power transmission lines and large electric motors because they allow lower line voltages and provide a smoother flow of electricity. A three phase circuit consists of three alternating current conductors combined into…
A star is a massive ball of plasma that emits light throughout the universe. While there is only one star in our solar system, there are billions upon billions of stars throughout our galaxy and exponentially more in the billions…
An imprint fossil, also known as an impression fossil or fossilized impression, is a fossil that doesn’t contain organic material. They are a form of trace fossil – a fossil that leaves evidence of an organism’s movements or activity. Examples…
