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Weathering processes crack, wear away, and weaken rocks. Over time, it may cause large changes to the landscape. Physical and chemical weathering degrade rocks in different ways. While physical weathering breaks down a rock’s physical structure, chemical weathering alters a…
There are many different ways to measure the speed something is turning, but you’ll need to understand what they actually mean if you need to convert from one to another. For instance, if the crankshaft of a car engine is…
Peacocks are showy, flashy birds known for their large tail plumage, brightly colored heads and proud avian strut. From the pheasant family of birds, peacocks are the male version of the group known as peafowl (the females are called peahens),…
The name “hummingbird” comes from the slight hum noise created by their rapidly beating wings. They’re so light that it would take around 150 hummingbirds to make up a single pound. Hummingbird mating is a lot like other bird mating…
Three-phase power is a widely used method for generating and transmitting electricity, but the calculations you’ll need to perform are a little more complicated than for single-phase systems. That said, there isn’t much extra you have to do when working…
Electricity and Conduction To understand why salt water conducts electricity, we have to first understand what electricity is. Electricity is a steady flow of electrons or electrically charged particles through a substance. In some conductors, such as copper, the electrons…
The tallest land animals in the world and the largest of Earth’s grazing ungulates, giraffes (Giraffa camelopardalis) live in the savanna grasslands of sub-Sarahan Africa. Giraffes exhibit several characteristics developed through their evolution in a grassland environment in which scattered…
In the animal kingdom, there are two major types that consume plants as a regular part of their diet: herbivores and omnivores. The major difference between the two is that while herbivores subsist on a diet made up exclusively of…
Learning to do basic math in your head is useful, but there are times when you need to make sure you are calculating the problem exactly. To subtract any percentage from a number, simply multiply that number by the percentage…
A savanna grassland is an ecological system with scattered shrubs and isolated trees. The grasslands are found on both sides of the equator between tropical rainforests and desert biomes and have warm temperatures year round. A grassland savanna has a…
