End Of Year Revision Year 8 Flashcards
(35 cards)
What is a cold environment?
A cold environment is an environment that is covered in ice all year round. It can contain permafrost, glaciers etc.
Where can you find cold environments?
You can find cold environments in high altitudes because there is low air particles and you can also find cold environments in high latitudes and low because the sun has to reach most areas but the angle of the sun’s radiation can’t reach high and low latitudes
What does the ablation zone do?
The glacier melts and retreats
What does the accumulation zone do
It accumulates snow and advance
What does plucking do about glaciers?
Plucking is a process of erosion that occurs during glaciation. As ice and glaciers move, they pull away pieces of rock which causes erosion. This steepens the corrie’s back wall.
What does abrasion do in glaciers?
Rock scrapes the bedrock on the back wall making the corrie steeper
What is freeze-thaw weathering
Freeze-thaw weathering is when melted water from the glacier is forced into cracks. When it is night, the temperature decreases which freezes the water. As the water freezes it increases by 9%. This forces the cracks widen. This is a repeated process.
How does the glacier move inside a corrie
It moves in a cycle motion called rotational slip as the glacier can’t go over the hill.
How are U shaped valleys form?
U-shaped valleys are the result of glaciers moving downhill and ‘scouring’ the earth with friction as gravity pulls the glacier from the top of an elevated area to the bottom. The huge size and heavy weight of the glacier creates a thick, slush-like layer of ice and water beneath the ice mass.
How are V shaped valleys formed?
Rivers begin high up in the mountains so they flow quickly downhill eroding the landscape vertically. The river cuts a deep notch down into the landscape using hydraulic action, when the sheer force of the water gets into small cracks and breaks down the sides of the river valley.
How is ice melting?
Climate change(rising sea levels)- use of cars, planes boats, generate electricity etc.
What would happen if there is no ice (all melted)
People and animals will lose land because of rising sea levels
How can we tell that climate change is getting worse
Rising sea levels, rising temperatures etc.
How can people help with climate change
Go on public transport, walk to school, share cars, cycle, drive electric vehicles, use less beef etc.
Who is to blame for climate change
China- factories US- Since it’s a rich country people own boats, cars, vans private jets etc.
What is the consequences of climate change in UK.
Water shortage, if pipes freeze in winter or drought occur in summer. The cost of living will increase, such as food, fuel and insurance. Your home may be damaged by floods and gales. Extreme weather may affect where you work, schools and transport links.
What are the consequences of climate change for the Maldives?
Global warming and rising sea levels are causing warming of the seas and more severe frequent tidal waves and flooding in Maldives. Tidal waves and flooding often contaminate groundwater and sewerage systems leading to disease outbreaks in the country.
What features do BedZED houses have to improve climate change?
The materials for the house were >35 miles to reduce CO2 emissions,There is a roof vent/ventilation system, plants to collect water for toilets and to absorb CO2,low energy lighting, thick insulated walls,Buildings are faced south and there are triple glazed windows to maximise solar gain,bikes provided and a nearby bus stop.
What are the costs and benefits of renewable energy sources?
Electricity can be cheaper, more jobs, more reliability, and also a large cost for materials for the sources, etc.
Examples of renewable energy resources.
Solar energy, wind, falling water, the heat of the earth (geothermal), plant materials (biomass), waves, ocean currents, temperature differences in the oceans and the energy of the tides.
What facilities did the Swansea Bay Lagoon have?
This will generate electricity by tidal energy, more jobs, lagoon, a centre, education,can be use for Olympics
What is a source in a river
A river source is the start of a river
What is a confluence in a river?
Confluence - the point at which two rivers meet.
What is a tributary
Tributary - a small river or stream that joins a larger river.
