Members of provincial legislatures in Canada are sometimes referred to as member of provincial parliament (MPP) and other times member of legislative assembly (MLA).
Relative key
When a piece of music is in a major key, the relative minor means the minor key which has the same key signature. It can be found by taking the sixth note of the first scale and playing a minor scale starting on that note. For example: in C major the sixth note is an A. Therefore, A minor is the relative minor of C major (C major and A minor share the same key signature: no sharps or flats).
C major is called the relative major of A minor.
A complete list of relative minor/major pairs in order of the circle of fifths is:
Electrolysis
Electrolysis is a scientific way of 'splitting' substances. Electrolysis means 'electric-splitting' and involves the separation of substances through an electric current.
Metals above carbon in the reactivity series (potassium, sodium, lithium, calcium, magnesium and aluminium) are extracted by electrolysis.
Electrolysis is used in the mining industry to split reactive metals from their ores after they are taken from the ground. Electroplating is also used to plate (cover) things with metal because it costs less than using, for example, solid gold to make jewellery.
Many beauty shops use electrolysis or electrology to remove hair. This is done by "electrocuting" the hair so it splits along its root.
Electrolysis makes the anions (negative ions) go to the anode (positive electrode) and the cations (positive ions) go to the cathode (negative electrode). So, for example, oxygen would go to the anode and iron would go to the cathode.
Jurassic
The Jurassic is the second and middle geological period in the Mesozoic era and the eighth period in the Phanerozoic eon. It began 201.3 million years ago, and ended 145 million years ago. The Jurassic period happened between the Triassic and Cretaceous periods.
During the Jurassic period, the climate was hotter and wetter than it is today. Carbon dioxide levels and sea levels were also higher than today.
The Kimmeridge Clay of the Upper Jurassic was laid down in an environment which does not exist on the earth today. Much of Western Europe was covered by a high sea level. The supercontinent Pangaea was beginning to break up, causing a narrow Atlantic Ocean. Because of this, the United Kingdom was covered by a shallow and largely anoxic sea, perhaps less than 100 metres deep, with occasional landmasses.
This was shallower water than the Blue Lias of the Lower Jurassic. It was often low in oxygen, which caused its organic material to decompose, but only partially. The Jurassic's mudstones are organic-rich, and gave rise to most of the North Sea oil.
During the early or Lower Jurassic, the supercontinent Pangaea broke up into the northern supercontinent Laurasia and the southern supercontinent Gondwana. This was the start of the break-up of Pangaea, a process which took a long time to complete. The process of pulling apart in geology is called rifting.
Floods of lava flowed from fissures (splits) and volcanos. By the end of the Jurassic, South America had begun to part from Africa. In the western part of North America, mountain ranges began to form. This continued as the American tectonic plates gradually moved west. The westward-moving North American plates gradually rode over the Pacific Ocean plates to form the Rocky Mountains.
On sea and land, evolutionary trends which started in the Upper Triassic continued through the Jurassic. Archosaurian reptiles dominated the land biota. Reptile groups radiated and filled many niches. Dinosaurs, pterosaurs, marine reptiles (Ichthyosaurs, Plesiosaurs, turtles) all flourished.
Amongst Invertebrates, there was much change. Modern predators like starfish, crabs, and hole-boring gastropods took over the sea floor, eating the benthic fauna in huge numbers. Brachiopods lost their grip on the in-shore habitats; molluscan bivalves took their place.
Early mammals existed, but mostly as small creatures living in burrows, on the margins of a reptilian world. The first fossils of small dinosaurs with feathers, called "Anchiornis," come from the Jurassic period. The first fossil bird, "Archaeopteryx", comes from the Upper Jurassic.
The dominant land plants were the gymnosperms (conifers). Ferns, large horsetails,'monkey puzzle' trees, ginkgos and cycads were common. These trees were not easy to digest, compared to modern flowering plant trees (Angiosperms). They must have spent longer in the gut than the food of modern herbivores. That would make increased size an advantage for sauropods, which did indeed become much larger in the Jurassic than any any land life had before.
Triassic
The Triassic is the first geological period in the Mesozoic era and the seventh period of the Phanerozoic eon. It lasted 50.6 million years. The period began 251.9 million years ago, and ended 201.3 million years ago.
The period before the Triassic was the Permian period, the last period in the Palaeozoic era. The Jurassic period came after the Triassic.
Many new groups arose during the Triassic period, including the dinosaurs and the first mammals.
Great extinction events happened at both the beginning and end of the Triassic period. The Triassic began after the great extinction at the end of the Palaeozoic era, the Permian/Triassic extinction event. Nobody really knows the exact cause of the Permian/Triassic extinction, but many experts have different theories. Generally, experts agree that many things caused the extinction.
The Triassic had several more extinction events, whose causes are also unknown. The most significant of these took place at the end of the Triassic, which was one of the 'big five' Phanerozoic marine extinctions.
The name 'Triassic' comes from the three rock strata that formed during the Triassic period ("tri" means "three"). Three layers of rock strata formed during this period:
On average, the Triassic's climate was very different from today's:
During the Triassic period, there were no separate continents like there are today. Almost all the Earth's land mass was together in a single supercontinent called Pangaea ("all the land"). Pangaea was centered more or less on the equator. All the deep-ocean sediments (the things that settled at the bottom of the ocean) had disappeared. This happened because oceanic plates moved sideways and downward until they were finally on top of each other, or under each other.
The supercontinent Pangaea was rifting during the Triassic – especially late in the period – but had not yet separated into different continents.
Being a super-continental land mass, Pangaea had limited shoreline. Because of this, Triassic marine deposits fossils from Triassic ocean life are rare in most of the world. In North America, for example, marine deposits are limited to a few exposures in the west. However, they are common in Western Europe, where the Triassic was first studied.
The first part of the Triassic had much less variety than the Permian, and showed signs of a deteriorated environment. This situation lasted for about 5 million years, then steadily improved. Into the vacant ecological niches, new forms evolved, replacing old with new. This rapid adaptive radiation happened to the reptiles on land, the fish in the seas, and a number of other groups, like the insects. Diverse communities with complex ecology took 30 million years to re-establish.
The group of bony fish known as the teleosts first appeared during the Triassic period. The group now includes over 80% of all fish and 95% of all bony fish. The only other common group of fish are the Chondrichthyes (the sharks and rays). The rays also appeared during the Triassic.