deep-sea trench, also called oceanic trench, any long, narrow, steep-sided depression in the ocean bottom in which occur the maximum oceanic depths, approximately 7,300 to more than 11,000 metres (24,000 to 36,000 feet). They typically form in locations where one tectonic plate subducts under another.
What is a trench in science for kids?
Trenches are like extremely deep valleys, just in the ocean instead of on land. They are found at subduction zones, where tectonic plates meet and one goes under the other, and most are found at the Ring of Fire, which is a ring-like area around the Pacific Ocean.
What is trench short answer?
A trench is a long narrow channel that is cut into the ground, for example in order to lay pipes or get rid of water. 2. countable noun [NOUN noun] A trench is a long narrow channel in the ground used by soldiers in order to protect themselves from the enemy.
Where are trenches located?
Trenches are found on the floor of the sea; however, their common name is deep ocean trenches because they are more often found in the deepest areas of the ocean. Trenches are formed in subduction zones where tectonic plates collide.
What is ocean trench in science? – Related Questions
How trench is formed?
In particular, ocean trenches are a feature of convergent plate boundaries, where two or more tectonic plates meet. At many convergent plate boundaries, dense lithosphere melts or slides beneath less-dense lithosphere in a process called subduction, creating a trench.
What is the biggest trench in the world?
The Mariana Trench, in the Pacific Ocean, is the deepest location on Earth.
Where are ww1 trenches located?
Trenches were common throughout the Western Front.
Trench warfare in World War I was employed primarily on the Western Front, an area of northern France and Belgium that saw combat between German troops and Allied forces from France, Great Britain and, later, the United States.
What are the 5 ocean trenches?
The Five Deeps Expedition was the first to reach the deepest point in each of the Earth’s five oceans: the Puerto Rico Trench in the Atlantic, South Sandwich Trench in the Southern Ocean, Java Trench in the Indian Ocean, Challenger Deep in the Pacific and Molloy Deep in the Arctic.
How many trenches are there in the world?
Globally, there are over 50 major ocean trenches covering an area of 1.9 million km2 or about 0.5% of the oceans. Trenches are geomorphologically distinct from troughs.
What are trenches in ww1?
Trenches in WWI were constructed with sandbags, wooden planks, woven sticks, tangled barbed wire or even just stinking mud. British soldiers standing in water in a trench.
What is a trench used for?
In construction, trenches are dug for foundations of buildings, retaining walls and dams, and for cut-and-cover construction of tunnels. In archaeology, the “trench method” is used for searching and excavating ancient ruins or to dig into strata of sedimented material.
What were trenches like 3 facts?
Top 10 Facts about The Trenches
- Trench warfare was started by the Germans in The First World War.
- There was 2,490 kilometres of trench lines dug during the First World War.
- Most trenches were between 1-2 metres wide and 3 metres deep.
- Trenches weren’t dug in straight lines.
What are the 4 types of trenches?
- Front-line Trench. This type of trench was also known as the firing-and-attack trench.
- Support Trench. This trench was several hundred yards behind the front-line trench.
- Reserve Trench. The reserve trench was several hundred yards behind the support trench.
- Communication Trench.
Who invented trenches?
The tactical ancestor of modern trench warfare was the system of progressively extended trenches developed by the French military engineer Sébastien Le Prestre de Vauban for the attack of fortresses in the 17th century.
What did a trench look like?
Trenches were long, narrow ditches dug into the ground where soldiers lived. They were very muddy, uncomfortable and the toilets overflowed. These conditions caused some soldiers to develop a problem called trench foot. There were many lines of German trenches on one side and many lines of Allied trenches on the other.
What were the three trenches called?
There were three different types of trenches: firing trenches, lined on the side facing the enemy by steps where defending soldiers would stand to fire machine guns and throw grenades at the advancing offense; communication trenches; and “saps,” shallower positions that extended into no-man’s-land and afforded spots
How was life in the trenches?
Trench life involved long periods of boredom mixed with brief periods of terror. The threat of death kept soldiers constantly on edge, while poor living conditions and a lack of sleep wore away at their health and stamina.
Who won 1st World war?
The first World War was won by the Allies consisting of the United Kingdom, France, United States, Japan, Italy. They defeated the Central Powers consisting of Imperial Germany, Austro-Hungary Empire and the Ottoman Empire. It lasted from 1914 and lasted until the signing of the Versailles Peace Treaty in 1919.
What is the main fire trench?
There is a front line, or “Main Fire Trench” facing the enemy. It is not straight, but follows contours or other natural features allowing good defence or a view over the enemy lines. Thousands of men became casualties in fighting for, or making small adjustments to their lines, to give this cover or observation.
What did World war 1 soldiers eat?
By the First World War (1914-18), Army food was basic, but filling. Each soldier could expect around 4,000 calories a day, with tinned rations and hard biscuits staples once again. But their diet also included vegetables, bread and jam, and boiled plum puddings. This was all washed down by copious amounts of tea.
What did they eat in the trenches?
The ‘trench ration’ was designed to feed a certain number of soldiers. It was used when the food prepared in the field kitchens could be delivered. It included corned beef, sardines, salmon, coffee, salt, sugar and even cigarettes. The ’emergency ration’ included highly caloric aliments, such as chocolate.