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Kangaroos are members of the marsupial group of mammals, and they have many unique characteristics. They are exclusively herbivorous, and one of their defining features is the pouch in which they raise their young. The kangaroo life cycle starts with…
The concept of experimental value is important in scientific experiments. Experimental value consists of the measurements taken during an experimental run. When taking experiment measurements, the goal is to arrive at a value that is accurate and precise. Accuracy relates…
When light strikes a surface, some of its energy is reflected and some is absorbed. The color a person perceives indicates the wavelength of light being reflected. White light contains all the wavelengths of the visible spectrum, so when the…
An automobile is a wheeled vehicle with a self-contained motor that runs mostly on roads. Automobile speed is an outcome of four interacting factors: power, power train, weight and aerodynamics. Power The motive force for a car is the engine.…
“Go where you may within the bounds of California, mountains are ever in sight, charming and glorifying every landscape.” The words of the naturalist, John Muir have delighted many who travel over California’s landscape. However, the state’s landforms do not…
Mass, volume and density are three of an object’s most basic properties. Mass is how heavy something is, volume tells you how big it is, and density is mass divided by volume. Although mass and volume are properties you deal…
In geometry, a quadrilateral is a polygon with four sides or edges. There are several polygons that share the characteristics of a quadrilateral. However, while at least six shapes can be considered quadrilaterals, only two have four right angles —…
Projectile motion problems are common on physics examinations. A projectile is an object that moves from one point to another along a path. Someone can toss an object into the air or launch a missile that travels in a parabolic…
The survival of any creature depends on its ability to satisfy its requirements for things like food and shelter while avoiding predators and other harms. Adaptations, either in the animal’s behavior or in its structure, give the animal the features…
What’s the difference between a swell and a wave? A sea swell, meaning a collection of waves produced by storm winds raging hundreds of miles out to sea, is different from waves, which are the product of local winds along…
