Topic 1- Hazardous Earth Flashcards
At the poles, cool air sinks creating high pressure. The high-pressure air is drawn back towards the equator as su face winds. Is this true or false?
True
2 natural causes of climate change
. Orbital changes
. Volcanic eruptions
Why is there little rain associated with areas of high pressure?
The air in these areas sink. As air decends it compresses and warms up meaning it wont form a cloud
Example of a high pressure area
Autralia
2 peices of evidence of climate change
. Tree rings
. Ice cores
When does a tropical sto m lose its energy?
When it makes itself to land
Why is it more common for cyclones to form Between the equator and tropic of cancer,Between the equator and tropic of Cap ico n?
This is because the temperatures between these areas ade warmer of atleast 26.5 degrees
What are the names of our 2 tropical cyclone case studies?
Cyclone nargis (myanmar), hurricane katrina (united states)
Short term effects in hurricane katrina and cyclone nargis
Katrina
. Around 1400 deathes
. Flooding
. Thousands displaced
Nargis
. 140,000 lives lost
. Infrastructure Collapse
. Government Restrictions on Aid
Long term effects on cyclone nargis and hurricane katrina
Cyclone nargis- severe flooding
Hurdicane katrina- sewage system probems
Preperation for katrina and nargis (hurricanes in general)
Katrina
. Satellite tracking
. Good Building design
Nargis
. Myanmar doesn’t have a dedicated monitoring centre for tropical cyclones
. Forests help protect from flooding
Volcanic activity can cause long te m changes in climate. Is this true or false?
True
Explain how transpo rt cont ibute to the enhanced greenhouse effect?
Fossil fuels, which release carbon dioxide (CO₂) and other greenhouse gases that are released by card etc, trap heat in the Earth’s atmosphere.
What was an impacts of the Little Ice Age?
Killed people, animals
What is a storm surge?
A storm surge is a sudden rise in sea level caused by strong winds (hurricane)
How do countr ies prepare for tropical sto ms?
Count ries will prepare for a tropical sto rm hours before it hits. When they do this an alar m will go of indicating that a tropical sto m will happen. Count ries will set up shelters in places like subways or tell them to evacuate the area.
Two environmental impacts of tropical storms
Erosion, Destruction of Ecosystems eg forests
How do earthquakes occur?
Transform Boundaries: Plates slide past each other horizontally.
What are the two plate margins?
Convergent- land moves into eachother
Divergent- land seperate and pulls away from eachother
One way the government helped people after the earthquake in chili
. Made 300,000 houses
Definition of source area
the region in which a tropical storm first forms
What is a convergent plate boundary?
plates are moving towards each other. The plate that is denser will be submerged under the less dense. This often creates volcanos
What are divergent plate boundaries?
plates that are moving apart. Magma will fill the gap left between the plates, forming new crust.
What ate conservative plate boundaries?
two plates are sliding past each other. These often create earthquakes from the pressure
