This week in Downing Street class we have been preparing to go on our River trip to Teddington and Kingston to learn more about the River Thames.
What do you know already about rivers? Try to include as much of the technical vocabulary as you can.
Here are some words to help you:
estuary, mouth, watershed, transportation,
source, tributary, meander, waterfall, gorge
Rivers are formed by high rain fall that digs into to the ground that process is called a source,when dig into the ground this forms a tributuary or a stream .
ReplyDeleteDiffrent streams meet up and join ,time to time heavy rain flow comes in and
cuts into the ground and it size grows and that how river is made .
A river can start in places like hills and mountains where melting snow collects and forms tiny streams.This is called the source.A really fast river can create waterfalls where it carves out layers of rocks. A lot of rivers have meanders which is a bend where the water is moving more slowly.
ReplyDeleteRivers are formed when heavy rain falls for along period of time and rivers are also formed when the ice melts on the top of the mountains, this is the process of the source. A meander is when a river has twists or turns . Deposition is when the river energy is wilted and weak so if it picks up a large chunk of stone it will not float instead it will roll along with the river.
ReplyDeleteTransportation is when for example a tree falls into a river it will get transported to sea. Derision is when the water carries small rocks and soils when its so raging it can cause trees to fall into it.
Rivers
ReplyDeleteThe source of a river is where it starts; this is often in the mountains. Rivers can be dangerous and some flow very quickly. Rivers can wear away rock to make deep valleys that are called gorges. A tributary is a river that flows into another river. Rivers are used for many things. They can be used to transport things by boat, sailing boats for fun and swimming in, if they are clean. In Sunderland they used to build ships on the River Weir so that they could easily be moved to the sea. The mouth of the river is where it meets the sea and sometimes there is an estuary there. One of the longest rivers in England is the River Thames.
Esme
What I know about rivers
ReplyDeleteRiver water is normally freshwater and not salty. It becomes salty when it reaches the sea.
Transportation is when rocks and stones move down rivers, streams and tributaries. Erosion is when the movement of the water wears rocks and stones out. Deposit: When the rocks and stones are dropped further down the river. Mouth: The mouth is when a river meets the sea. It is like our mouths when we are drinking water. Meander: When the river path goes wiggly and windy. Source: Where the river starts. It is always on a hill or a mountain and is higher than the sea. Tributary: It branches off the main course of a river like little branches off a tree.
Litmus paper measures the pH value of different substances like water. A low pH will show that it is Acid, a pH of 7 will show that it is neutral and a pH above 7 shows that the substance is alkaline.
Alluvium, Gravel, Chalk, Clay are all different types of substances found in river water. Some, like chalk and alluvium absorb water, and others like gravel do not absorb it so the water passes through it.
Algae is a green water plant.
Locks are like big doors that open and close to level the river water.
There are two types of sluices in every lock, a top one and a bottom one. These open to let the water in and out.
Weirs are like steps that are built by man to control the flow of the river.
I know that rivers can sometimes be very deep or very shallow and if it rises above the high level it could cause a flood and the last flood in the river Thames was around the 1800s and it rose above our head. Also the river Thames is the most popular. The start of a river is called the source and the end of the river is called the mouth which goes out to sea. The river is made deeper by the rocks being pushed to the side. There are some rivers that can be very strong and some could be very calm.
ReplyDeleteRiver is a big stream of water.A river begins at a source and ends at a mouth,following a path called course. Rivers can flow down mountains,through valleys or along plains,and can create canyons or gorges. River have been used as a source of water, for obtaining food, for transport, as a defensive measure, as a source of hydropower to drive machinery, for bathing, and as a means of disposing of waste. Rivers have been used for navigation for thousands of years.
ReplyDeleteRivers
ReplyDeleteRivers are basically big strips of streams. Later on the rivers join seas, which in turn become big oceans like the Atlantic and Pacific.
When a river starts, it is called the source of the river or source for short. The water meanders and takes bits of rock and grass with it. This is called an erosion. Then it transports to different places. Finally it leaves the rocks. This is called deposition.
It continues to meander until it reaches the sea.
On it’s way, it might face a gorge and a few waterfalls. Finally it reaches the sea. This is called an estuary.
Did you know?
One of the ancient wonders of the world, The Grand Canyon is a landscape formed by river corrosion. Also rivers have been the main reason for many civilizations
I learnt that a rock called gravel can go down faster. I also learnt very well that a sorce is higher that the mouth because a mouth is at the bottom and the sorce is at the top.
ReplyDeleteA waterfall is where a river or stream falls over the edge of a hill or high pieces of land. The source is where a river starts and is usually on high ground like in the mountains. The water flows as a stream or river to the mouth at the sea. When the river meets the sea it sometimes spreads out in to lots of streams making an estuary. The fresh water from the river mixes with the salty water from the sea. This water is brackish water, it’s a mix of both. Sometimes rivers & streams meander, they curve and bend. Tributaries are little streams that join rivers or other streams. A watershed is where lots of little streams join to a bigger river. Erosion is when a river erodes (cuts though) the land changing its course making it meander or straighter. The soil, rocks, stones and mud that it eroded is transported down the river until it sinks and settles. Rivers can transport lots of different kinds of objects like trees, coconuts, fruits, even peoples houses and gardens when rivers flood and flow very quickly. When there is a lot of rain sometimes rivers flood and the water flows over their banks. This can cause danger to people and animals. A lock helps boats move up and down when there is a hill because water flows down not up. A weir changes the course of a river and sends it off in different direction. A gorge is narrow with steep sides and a river flowing through it. They are often made by the river eroding the land.
ReplyDeletemeanders is a river going in wiggly lines
ReplyDeletealso deposition is when the rocks come from the source
and the rocks sticks to the wall and does it again.
A river is fresh water flowing across the surface of the earth, usually to the sea or to the ocean. Rivers play an important part in our lives. They carry water and nutrients all over the world, help in the water cycle, contribute to farming and irrigation and water transport, provide excellent habitat and food for many organisms. Different species of wildlife thrive on the fertile plains around the rivers and in their deltas. Most importantly, the rivers are a major source of energy.
ReplyDeleteA river begins its journey from a ‘Source’, which is usually in high places such as mountains and hills. Sources can be of the following types:
• Springs
• Rainfall or melting snow
• Lakes
• Bogs
Small streams called ‘tributaries’ can feed into the main river, joining it at points called confluences. The area of land drained by a river is called its drainage basin, and the edge of highland surrounding a drainage basin is called the ‘watershed,’ which may mark the boundary between two drainage basins.
A river’s course has 3 stages - upper, middle and lower.
In the upper course, when the river starts from the source it is smaller and flows very quickly tumbling through rocky hills and mountains, creating features like rapids, ‘waterfalls’ and steep-sided valleys called ‘gorges.’
In the middle course the journey of the river becomes slower and wider, and often follows a winding path forming horseshoe-like loops called ‘meanders.’ These loops often get cut off from the main river to form oxbow lakes.
The lower course is when the river nears the end of its journey, and it is much slower are wider. The end of the river where it meets the sea is called its ‘mouth’, or ‘estuary’, where it is a mixture of salty and fresh water. At the mouth of large rivers we often find a delta, which is a large area of silt deposit that splits the river into slow-flowing channels called distributaries.
The main processes associated with a river are erosion, ‘transportation’ and deposition. As the river flows fast in its upper and middle courses, the current of the water loosens rocks and soil cutting channels in the ground, and this process is known as erosion. The process by which the material loosened by erosion is carried downstream along the river is called transportation. As the river gets slower in its later stages, it drops the eroded and transported material by a process known as deposition.
the narrow curves and turns are are called a Meander. Deposition is when the energy is too strong for material. So the material get's pushed by the water and drags across the river bank slowly and attached to the soil. And where the water goes out to sea,is called a Mouth or a Delta.
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