Unit 2 Flashcards
What are the types of evidence for climate change?
- Fossils
- Ice cores
- Tree rings (how long growing season was)
What is the Milankovitch cycle?
The process by which the planet’s proximity to the sun varies, known as eccentricity. In terms of obliquity (how straight earth’s rotation is) the earth tilts. Finally, it wobbles on its axis.
How do we release greenhouse gases?
Deforestation, burning fossil fuels, farming animals
What are the natural elements to the greenhouse effect?
Animals breathe out carbon dioxide, and when volcanoes erupt they release carbon into the atmosphere
How many types of atmospheric cell are there?
Three
What are the three types of atmospheric cell
Polar cells, ferrel cells (middle), hadley cell (equator)
What are the stores of carbon?
The air, the soil, plants, fossil fuels, animals
What happens to carbon during photosynthesis?
Carbon goes from the atmosphere to plants
What is the difference between climate and weather?
Weather is temporary, climate is a trend
What are the factors of weather variation in the UK?
- Latitude
- Altitude
- Coast proximity
- East/west
How does being in the West affect places?
Weather systems moving across the Atlantic hit the West first, making it more rainy.
What air mass do we get from the North?
The Arctic Maritime air mass, which brings wet and cold air
What air mass do we get from the east?
The Polar Continental air mass, which brings dry summer and cold winters
What air mass do we get from the south?
The Tropical Continental air mass, which brings hot dry air
What air mass do we get from the south west?
The tropical maritime air mass, which brings warm, moist air
What air mass do we get from the North West?
The polar maritime air mass, bringing cold, showery weather
How do cities affect climate?
They have a microclimate - buildings release internal heat, and tall buildings block wind, while tarmac absorbs heat. The result is higher temperatures
How many degrees warmer is a city of a million than its surrounding areas?
2 degrees to 5 degrees
What is a large scale ecosystem known as?
A biome
Where does the Tundra cover?
Most of the North
What kind of place is classified as a desert?
Somewhere that gets less than 25cm of rain per year
What do biotic and abiotic mean
Biotic - living
Abiotic - not living
What is succession?
When plant and animal communities give way to one another until a climax is reached
How does succession happen?
A pioneer species colonises bare ground, the decay of plants produces nutrients which allows more plants to grow, and soils develop to allow bigger plants to grow, until a dominant species invades, completing the succession.
What are the four layers in a rainforest?
The shrub layer, under canopy, canopy, and emergent layer
List two adaptions of the tropical rainforest
Lianas - woody vines which use trees to climb to the canopy
Buttress roots - roots which stretch from the ground to two metres or more up the trunk