PAPER 1 SECTION B Flashcards
(41 cards)
What is a freshwater pond ecosystem?
A small scale ecosystem in the UK providing various habitats for plants and animals due to changes in oxygen, water, and light.
What components make up a freshwater pond ecosystem?
Plants, fish, birds, organisms, water, sunlight, and temperature.
What are examples of producers in a freshwater pond ecosystem?
- Algae
- Marsh marigold
- Waterlily
What are examples of consumers in a freshwater pond ecosystem?
- Frog
- Heron
- Fish (e.g. perch)
- Duck
- Waterworms
- Rat-tailed maggot
Define an ecosystem.
A natural system made up of plants, animals, and the environment.
What are biomes?
Larger ecosystems on a global scale, such as tropical rainforest or desert.
What is a food chain?
A single line of linkages between producers and consumers showing what eats what.
What is a food web?
A complex network showing all the linkages between producers and consumers in an ecosystem.
What is the nutrient cycle?
The movement of nutrients around an ecosystem, involving decomposition and nutrient uptake by plants and consumers.
True or False: A change in one part of an ecosystem can impact other parts.
True
What is one economic opportunity in the Sahara Desert?
Mining for oil and gas.
Where is the Hassi Messaoud oilfield located?
Algeria, Sahara Desert, Northern Africa.
What percentage of Algeria’s GDP comes from oil and gas?
60%
What are the disadvantages of mining in the Sahara?
- Transportation of workers and supplies is challenging
- Difficult drilling conditions
- Need for extensive pipelines
What is one use of solar panels in the Sahara?
To generate clean renewable energy.
What is a disadvantage of using solar panels in the Sahara?
Sandstorms can destroy solar panels and require water for cleaning.
What crops are grown using the River Nile for irrigation?
- Dates
- Figs
- Fruit
What is a disadvantage of agriculture near the River Nile?
Rapid evaporation of irrigation water leads to salinity.
What are some challenges of developing in the Sahara?
- Extreme temperatures
- Inaccessibility
- Water supply issues
What causes desertification?
- Climate change
- Over-grazing
- Over-cultivation
- Deforestation
What impact does climate change have on desertification?
It results in extreme weather, such as droughts, leading to soil degradation.
What is afforestation?
The process of planting trees to help hold soil and prevent erosion.
What is crop rotation?
Allowing fields to rest between farming to restore soil nutrients.
What is the climate of deserts?
Hot and dry, with less than 250mm of precipitation per year.
