All content (geography) Flashcards
how does precession cause climate change
every 26,000 years the earth wobbles, causing one hemisphere to receive hotter weather, and the other to receive colder
which direction does wind flow
from areas of high pressure to low
what causes wet weather in the uk
low pressure belt
Examples of decomposers in freshwater ponds
maggots
temperature range of rainforests
21 to 30 degrees all year
What are Epiphytes
Plants which grow on other plants, (common in tropical rainforests)
Why do trees in tropical rainforests have smooth and thin bark
To let the water run easily off the tree, so it doesn’t absorb too much
What percent of the earth is covered in rainforest
6 percent
What are 3 reasons for deforestation
logging and timber
mineral extraction
farming and agriculture
how many drugs have been made from the amazon
7,000
Why do desert plants have spines instead of leaves
To give the plant the minimum possible surface area, to stop water loss via transpiration
Why do jackrabbits have huge ears
large surface area to volume, so they can lose heat easily
2 animal adaptations of tropical rainforests
spider monkey has long, strong limbs to help it climb through the canopy
Jaguars have spotted skin to hide from predators
What is managed retreat
Managed retreat is a soft engineering strategy, which involves allowing the sea to erode an area of land. This is used if the land is low value, or the budget for defences is low.
Where did managed retreat occur, and why did it need protecting?
Medmerry, west sussex, 300 homes where endangered
What causes an ice age to start
If a summer coincides with the earth being farthest away from the sun (caused by eccentricity)
