extinct Trilobites died Brachiopods died Graptolites died An ice age was blamed for this mass extinction They think climate change was the cause for this Fall in sea level Messed up the chemistry of the oceans 443 Mya End of Ordovician period Start of Silurian period Late Devonian mass extinction 3 quarters of all species went extinct Reefs got a hard hit Much of the sea bed became devoid of oxygen Nothing could be near the sea bed except for bacteria Could of been multiple extinction over several
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words 20 minutes Reasons why your period may be irregular Your period is not always predictable. Some women have their menstrual cycle every 28 days‚ whereas others may have longer cycles‚ or no cycle at all. It isn’t always a problem‚ but sometimes‚ it can lead to a diagnosis How do I know mine is irregular? Irregular periods are defined as cycles that are more frequent than every 21 days‚ or last longer than 8 days. You may also be irregular if your period is missed‚ early‚ or late. TO count
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Music in the Baroque Period Music is in everyone’s lives these days. You always see people with headphones in their ears or jamming out in their cars. Many people listen to music in the privacy of their homes‚ where they can listen to music as loud as they want and can sing along and not have anyone look at them funny. But do all these people who listen to music on a daily basis really know where it came from? A lot of people will say that Michael Jackson is the king of pop or that Elvis was the
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Hellenistic Period The Hellenistic Period was a new cultural age influence by Alexander the Great. It started after the death of Alexander and ended with the rise of Roman domination. After the death of Alexander the Great‚ his empire split up into smaller kingdoms and the Romans began to gain power. During this period‚ Greek ideas and culture was spread‚ hence the name Hellenic meaning Greek. Greek culture expanded from modest‚ localized city-states to large‚ open communities. The art in this period pushed
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4.3.1 Mehrgarh Period I (7000 BCE-5500 BCE) In this period I‚ people of that started farming but witout pottery. At that time people use plants‚ for instace wheat and barely catteles ‚ goats for farming and these are the source of their nutrion. They started to build building an place to live and theymade baskets to carry food and stones and bangels and things for very basic needs. And even at that they have sytem of burry as many buried had founded by archeologist teams. Jewelry which was wore
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This essay will briefly discuss the notion of ‘sensitive periods in development‚’ as introduced by Hugo de Vries and researched by Maria Montessori. It will further list Montessori’s explanation of the sensitive periods and their importance in a child between the ages of 0 and 6 years. Two examples will be discussed through personal reflection to demonstrate the author’s understanding of these periods. Many theorists such as Piaget‚ Vygotsky‚ Freud and Erikson have examined the idea that every
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the next. When falling off a horse‚ there are four steps one can expect: the initial shock‚ the realization of falling off‚ hitting the ground‚ and after the fall. Now hitting the ground may appear to be the worst part‚ but the fear of injury and uncertainty one has while in the air‚ is undoubtedly the most riveting thought that travels through one’s mind. The rider has two main scenarios in which he/she might fall off their horse: the horse could become scared‚ and take off‚ or they can stop sharply
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text‚ American Corrections by Todd R. Clear‚ George F. Cole‚ and Michael D. Reisig‚ the juvenile justice system is characterized by five time periods. The first time period is referred to as the Puritan Period. Between 1646 and 1824‚ misbehaved children who didn’t obey their parents would be considered evil and have to deal with the law. During the Refuge Period between 1824 and 1899‚ institutes were created to provide good work‚ study habits‚ and discipline to children. These
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A refractory period is a period of time where the cells are resistant to depolarisation. There are 3 different refractory periods‚ firstly the absolute refractory period which is the part of the cardiac cycle where no further depolarisation can take place. Secondly it is the relative refractory period where depolarisation of the cells can occur but only if the stimulus is strong enough‚ and finally there is the diminished refractory period where the cells are still resistant to depolarisation but
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Analyse the pecking order and the trade-off theories of capital structure and assess the extent to which these are supported by the empirical evidence. Pecking Order - Introduction The pecking order theory ( Donaldson 1961) of capital structure is among the most influential theories of corporate leverage. The pecking order theory is based on different of information between corporate insiders and the market. According to Myers (1984)‚ due to adverse selection‚ firm prefer internal to external
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